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Properties of the Line-of-sight Velocity Field in the Hot and X-Ray-emitting Circumgalactic Medium of Nearby Simulated Disk Galaxies Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 John A. ZuHone, Gerrit Schellenberger, Anna Ogorzałek, Benjamin D. Oppenheimer, Jonathan Stern, Ákos Bogdán, Nhut Truong, Maxim Markevitch, Annalisa Pillepich, Dylan Nelson, Joseph N. Burchett, Ildar Khabibullin, Caroline A. Kilbourne, Ralph P. Kraft, Paul E. J. Nulsen, Sylvain Veilleux, Mark Vogelsberger, Q. Daniel Wang and Irina Zhuravleva
The hot, X-ray-emitting phase of the circumgalactic medium of massive galaxies is believed to be the reservoir of baryons from which gas flows onto the central galaxy and into which feedback from active galactic nuclei and stars inject mass, momentum, energy, and metals. These effects shape the velocity fields of the hot gas, which can be observed via the Doppler shifting and broadening of emission
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All-sky Search for Transient Astrophysical Neutrino Emission with 10 Years of IceCube Cascade Events Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla, J. A. Aguilar, M. Ahlers, J. M. Alameddine, N. M. Amin, K. Andeen, G. Anton, C. Argüelles, Y. Ashida, S. Athanasiadou, L. Ausborm, S. N. Axani, X. Bai, A. Balagopal V., M. Baricevic, S. W. Barwick, V. Basu, R. Bay, J. J. Beatty, J. Becker Tjus, J. Beise, C. Bellenghi, C. Benning, S. BenZvi, D. Berley, E. Bernardini, D. Z. Besson, E. Blaufuss, S. Blot
Neutrino flares in the sky are searched for in data collected by IceCube between 2011 and 2021 May. This data set contains cascade-like events originating from charged-current electron neutrino and tau neutrino interactions and all-flavor neutral-current interactions. IceCube’s previous all-sky searches for neutrino flares used data sets consisting of track-like events originating from charged-current
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Bulk Flow Motion Detection in the Local Universe with Pantheon+ Type Ia Supernovae Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Maria Lopes, Armando Bernui, Camila Franco and Felipe Avila
The bulk flow in the Local Universe is a collective phenomenon due to the peculiar motions of matter structures, which, instead of moving in random directions, appears to follow an approximate dipole velocity flow. We apply a directional analysis to investigate, through the Hubble-Lemaître diagram, the angular dependence of the Hubble constant H0 of a sample of Type Ia supernovae from the Pantheon+
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Probing Depth Variations of Solar Inertial Modes through Normal Mode Coupling Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Krishnendu Mandal and Shravan M. Hanasoge
Recently discovered inertial waves, observed on the solar surface, likely extend to the deeper layers of the Sun. Utilizing helioseismic techniques, we explore these motions, allowing us to discern inertial mode eigenfunctions in both radial and latitudinal orientations. We analyze 8 yr of space-based observations (2010–2017) taken by the Helioseismic and Magnetic Imager on board the Solar Dynamic
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The Intrinsic Sizes of Odd Radio Circles Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 David S. N. Rupke, Alison L. Coil, Kelly E. Whalen, John Moustakas, Christy A. Tremonti and Serena Perrotta
A new class of sources, the so-called odd radio circles (ORCs), have been discovered by recent sensitive, large-area radio continuum surveys. The distances of these sources have so far relied on photometric redshifts of optical galaxies found at the centers of or near ORCs. Here we present Gemini rest-frame optical spectroscopy of six galaxies at the centers of, or potentially associated with, the
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The Effect of Starspots on Spectroscopic Age and Mass Estimates of Nonaccreting T Tauri Stars in the Taurus–Auriga Star-forming Region Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Facundo Pérez Paolino, Jeffrey S. Bary, Lynne A. Hillenbrand and Madison Markham
Accurate age and mass determinations for young pre-main-sequence stars are made challenging by the presence of large-scale starspots. We present results from a near-infrared spectroscopic survey of 10 T-Tauri Stars in Taurus-Auriga that characterize spot-filling factors and temperatures, the resulting effects on temperature and luminosity determinations, and the consequences for inferred stellar masses
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Investigating Mass Segregation of the Binary Stars in the Open Cluster NGC 6819 Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Claire Zwicker, Aaron M. Geller, Anna C. Childs, Erin Motherway and Ted von Hippel
We search for mass segregation in the intermediate-aged open cluster NGC 6819 within a carefully identified sample of probable cluster members. Using photometry from Gaia, Pan-STARRS, and the Two Micron All Sky Survey as inputs for a Bayesian statistics software suite, BASE-9, we identify a rich population of (photometric) binaries and derive posterior distributions for the cluster age, distance, metallicity
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Stellar Escape from Globular Clusters. II. Clusters May Eat Their Own Tails Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Newlin C. Weatherford, Frederic A. Rasio, Sourav Chatterjee, Giacomo Fragione, Fulya Kıroğlu and Kyle Kremer
We apply for the first time orbit-averaged Monte Carlo star cluster simulations to study tidal tail and stellar stream formation from globular clusters (GCs), assuming a circular orbit in a time-dependent spherical Galactic potential. Treating energetically unbound bodies—potential escapers (PEs)—as collisionless enables this fast but spherically symmetric method to capture asymmetric extratidal phenomena
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Gaia23bab: A New EXor Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 T. Giannini, E. Schisano, B. Nisini, P. Ábrahám, S. Antoniucci, K. Biazzo, F. Cruz-Sáenz de Miera, E. Fiorellino, M. Gangi, A. Kóspál, M. Kuhn, E. Marini, Z. Nagy and D. Paris
On 2023 March 6, the Gaia telescope alerted a 2 mag burst from Gaia23bab, a young stellar object in the Galactic plane. We observed Gaia23bab with the Large Binocular Telescope obtaining optical and near-infrared spectra close in time to the peak of the burst, and collected all public multiband photometry to reconstruct the historical light curve. The latter shows three bursts in 10 years (2013, 2017
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Protoplanetary Disk Polarization at Multiple Wavelengths: Are Dust Populations Diverse? Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Rachel E. Harrison, Zhe-Yu Daniel Lin, Leslie W. Looney, Zhi-Yun Li, Haifeng Yang, Ian W. Stephens and Manuel Fernández-López
Millimeter and submillimeter observations of continuum linear dust polarization provide insight into dust grain growth in protoplanetary disks, which are the progenitors of planetary systems. We present the results of the first survey of dust polarization in protoplanetary disks at 870 μm and 3 mm. We find that protoplanetary disks in the same molecular cloud at similar evolutionary stages can exhibit
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First Detection in Space of the High-energy Isomer of Cyanomethanimine: H2CNCN Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 David San Andrés, Víctor M. Rivilla, Laura Colzi, Izaskun Jiménez-Serra, Jesús Martín-Pintado, Andrés Megías, Álvaro López-Gallifa, Antonio Martínez-Henares, Sarah Massalkhi, Shaoshan Zeng, Miguel Sanz-Novo, Belén Tercero, Pablo de Vicente, Sergio Martín, Miguel Angel Requena Torres, Germán Molpeceres and Juan García de la Concepción
We report the first detection in the interstellar medium of N-cyanomethanimine (H2CNCN), the stable dimer of HCN of highest energy and the most complex organic molecule identified in space containing the prebiotically relevant NCN backbone. We have identified a plethora of a-type rotational transitions with 3 ≤ Jup ≤ 11 and Ka ≤ 2 that belong to this species toward the Galactic center G+0.693-0.027
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Impact of Ejecta Temperature and Mass on the Strength of Heavy Element Signatures in Kilonovae Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Donggeun Tak, Z. Lucas Uhm and James H. Gillanders
A kilonova, the electromagnetic emission produced by compact binary mergers, is formed through a delicate interplay of physical processes, involving r-process nucleosynthesis and interactions between heavy elements and photons through radiative transfer. This complexity makes it difficult to achieve a comprehensive understanding of kilonova spectra. In this study, we aim to enhance our understanding
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The Impact-driven Atmospheric Loss of Super-Earths around Different Spectral Types of Host Stars Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Wei Zhong, Cong Yu, Shi Jia and Shang-Fei Liu
A planet’s mass loss is important for the its formation and evolution. The radius valley (RV) is believed to be triggered by evaporation-induced mass loss. As an alternative mechanism for RV, the mass loss of post-impact planets is thoroughly investigated in this work. The impact energy is converted to the planet’s internal energy, enhancing its core energy and accelerating mass loss and orbital migration
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Age Determination of LAMOST Red Giant Branch Stars Based on the Gradient Boosting Decision Tree Method Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Hai-Feng Wang, Giovanni Carraro, Xin Li, Qi-Da Li, Lorenzo Spina, Li Chen, Guan-Yu Wang and Li-Cai Deng
In this study, we estimate the stellar ages of LAMOST DR8 red giant branch (RGB) stars based on the gradient boosting decision tree (GBDT) algorithm. We used 2643 RGB stars extracted from the APOKASC-2 asteroseismological catalog as the training data set. After selecting the parameters ([α/Fe], [C/Fe], Teff, [N/Fe], [C/H], log g) highly correlated with age using GBDT, we apply the same GBDT method
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The Role of Stochastic Fermi-type Particle Acceleration in the Inner Jets of Active Galactic Nuclei Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Jieshuang Wang, Frank M. Rieger and Yosuke Mizuno
High-resolution radio observations of nearby active galactic nuclei have revealed extended, limb-brightened structures in their inner jets. This ties in with other multiwavelength observations from radio to X-ray and gamma ray, indicating that a structured jet model is required. While electrons need to be kept energized to account for the observed features, the underlying particle acceleration mechanism
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Tests of the Kerr Hypothesis with MAXI J1803-298 Using Different RELXILL_NK Flavors Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Jie Liao, M. Ghasemi-Nodehi, Lang Cui, Ashutosh Tripathi, Yong-Feng Huang and Xiang Liu
Iron line spectroscopy has been one of the leading methods not only for measuring the spins of accreting black holes but also for testing fundamental physics. Basing on such a method, we present an analysis of a data set observed simultaneously by NuSTAR and NICER for the black hole binary candidate MAXI J1803-298, which shows prominent relativistic reflection features. Various relxill_nk flavors are
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Intrinsic Emission of PSR B1937+21 at 327 MHz Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Nikhil Mahajan and Marten H. van Kerkwijk
At 327 MHz, the observed emission of PSR B1937+21 is greatly affected by scattering in the interstellar medium, on a timescale of order the pulse period. We use the bright impulsive giant pulses emitted by the pulsar to measure the impulse response of the interstellar medium and then recover the intrinsic emission of the pulsar by deconvolution—revealing fine structure on timescales not normally observable
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Mass Flows in Expanding Coronal Loops Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Jeffrey W. Reep, Roger B. Scott, Sherry Chhabra, John Unverferth and Kalman J. Knizhnik
An expansion of the cross-sectional area directly impacts the mass flow along a coronal loop and significantly alters the radiative and hydrodynamic evolution of that loop as a result. Previous studies have found that an area expansion from the chromosphere to the corona significantly lengthens the cooling time of the corona and appears to suppress draining from the corona. In this work, we examine
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Interaction between a Coronal Mass Ejection and Comet 67P/Churyumov–Gerasimenko Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Zhenguang Huang, Gábor Tóth, Tamas I. Gombosi, Michael R. Combi, Xianzhe Jia, Yinsi Shou, Valeriy Tenishev, Kathrin Altwegg and Martin Rubin
The interaction between a coronal mass ejection (CME) and a comet has been observed several times by in situ observations from the Rosetta Plasma Consortium, which is designed to investigate the cometary magnetosphere of comet 67P/Churyumov–Gerasimenko (CG). Goetz et al. reported a magnetic field of up to 300 nT measured in the inner coma, which is among the largest interplanetary magnetic fields observed
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JWST Photometric Time-delay and Magnification Measurements for the Triply Imaged Type Ia “SN H0pe” at z = 1.78 Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 J. D. R. Pierel, B. L. Frye, M. Pascale, G. B. Caminha, W. Chen, S. Dhawan, D. Gilman, M. Grayling, S. Huber, P. Kelly, S. Thorp, N. Arendse, S. Birrer, M. Bronikowski, R. Cañameras, D. Coe, S. H. Cohen, C. J. Conselice, S. P. Driver, J. C. J. DŚilva, M. Engesser, N. Foo, C. Gall, N. Garuda, C. Grillo, N. A. Grogin, J. Henderson, J. Hjorth, R. A. Jansen, J. Johansson, P. S. Kamieneski, A. M. Koekemoer
Supernova (SN) SN H0pe is a gravitationally lensed, triply imaged, Type Ia SN (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0 cluster of galaxies. Well-observed multiply imaged SNe provide a rare opportunity to constrain the Hubble constant (H0), by measuring the relative time delay between the images and modeling the foreground mass distribution. SN H0pe is located
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Mass Ejection Driven by Sudden Energy Deposition in Stellar Envelopes Astrophys. J. (IF 4.9) Pub Date : 2024-05-15 Nicholas J. Corso and Dong Lai
A number of stellar astrophysical phenomena, such as tidal novae and planetary engulfment, involve sudden injection of subbinding energy in a thin layer within the star, leading to mass ejection of the stellar envelope. We use a 1D hydrodynamical model to survey the stellar response and mass loss for various amounts (Edep) and locations of the energy deposition. We find that the total mass ejection
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Measurement of the small-scale 3D Lyman-α forest power spectrum J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-15 Marie Lynn Abdul Karim, Eric Armengaud, Guillaume Mention, Solène Chabanier, Corentin Ravoux and Zarija Lukić
Small-scale correlations measured in the Lyman-α (Lyα) forest encode information about the intergalactic medium and the primordial matter power spectrum. In this article, we present and implement a simple method to measure the 3-dimensional power spectrum, P3D, of the Lyα forest at wavenumbers k corresponding to small, ∼ Mpc scales. In order to estimate P3D from sparsely and unevenly distributed data
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A wide-angle formulation of foreground filters for HI intensity mapping J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-15 Rahul Kothari and Roy Maartens
Neutral hydrogen intensity mapping can in principle deliver rapid and large-volume cosmological surveys with exquisitely accurate redshifts that are determined directly from imaging. However, intensity maps suffer from very strong foreground contamination. Future surveys will require efficient data pipelines to remove the foregrounds and reveal the cosmological signal. It is expected that this cleaning
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Testing an exact diffraction formula with gravitational wave source lensed by a supermassive black hole in binary systems J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-14 Xiao Guo and Zhoujian Cao
When it comes to long-wavelength gravitational waves (GWs), diffraction effect becomes significant when these waves are lensed by celestial bodies. Typically, the traditional diffraction integral formula neglects large-angle diffraction, which is often adequate for most of cases. Nonetheless, there are specific scenarios, such as when a GW source is lensed by a supermassive black hole in a binary system
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Revisiting the stochastic QCD axion window: departure from equilibrium during inflation J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-14 Vadim Briaud, Kenji Kadota, Shinji Mukohyama, Alireza Talebian and Vincent Vennin
If dark matter is made of QCD axions, its abundance is determined by the vacuum expectation value acquired by the axion field during inflation. The axion is usually assumed to follow the equilibrium distribution arising from quantum diffusion during inflation. This leads to the so-called stochastic window under which the QCD axion can make up all the dark matter. It is characterised by 1010.4 GeV ≤
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Fully non-Gaussian Scalar-Induced Gravitational Waves J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-14 Gabriele Perna, Chiara Testini, Angelo Ricciardone and Sabino Matarrese
Scalar-Induced Gravitational Waves (SIGWs) represent a particular class of primordial signals which are sourced at second-order in perturbation theory whenever a scalar fluctuation of the metric is present. They form a guaranteed Stochastic Gravitational Wave Background (SGWB) that, depending on the amplification of primordial scalar fluctuations, can be detected by GW detectors. The amplitude and
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Search for heavy dark matter from dwarf spheroidal galaxies: leveraging cascades and subhalo models J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-14 Deheng Song, Nagisa Hiroshima and Kohta Murase
The Fermi Large Area Telescope (Fermi-LAT) has been widely used to search for Weakly Interacting Massive Particle (WIMP) dark matter signals due to its unparalleled sensitivity in the GeV energy band. The leading constraints for WIMP by Fermi-LAT are obtained from the analyses of dwarf spheroidal galaxies within the Local Group, which are compelling targets for dark matter searches due to their relatively
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Probing the Circumgalactic Medium with Fast Radio Bursts: Insights from CAMELS Astrophys. J. (IF 4.9) Pub Date : 2024-05-14 Isabel Medlock, Daisuke Nagai, Priyanka Singh, Benjamin Oppenheimer, Daniel Anglés-Alcázar and Francisco Villaescusa-Navarro
Most diffuse baryons, including the circumgalactic medium (CGM) surrounding galaxies and the intergalactic medium (IGM) in the cosmic web, remain unmeasured and unconstrained. Fast radio bursts (FRBs) offer an unparalleled method to measure the electron dispersion measures (DMs) of ionized baryons. Their distribution can resolve the missing baryon problem and constrain the history of feedback theorized
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Bayesian Synthesis of Astrometric Wobble and Total Light Curves in Close Binary Supermassive Black Holes Astrophys. J. (IF 4.9) Pub Date : 2024-05-14 Andjelka B. Kovačević, Yu-Yang Songsheng, Jian-Min Wang and Luka Č. Popović
We test the potential of Bayesian synthesis of upcoming multi-instrument data to extract orbital parameters and individual light curves of close binary supermassive black holes (CB-SMBH) with subparsec separations. Next-generation interferometers, will make possible the observation of astrometric wobbles in CB-SMBH. Combining them with periodic variable time-domain data from surveys like the Vera C
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Deep Synoptic Array Science: First FRB and Host Galaxy Catalog Astrophys. J. (IF 4.9) Pub Date : 2024-05-14 Casey J. Law, Kritti Sharma, Vikram Ravi, Ge Chen, Morgan Catha, Liam Connor, Jakob T. Faber, Gregg Hallinan, Charlie Harnach, Greg Hellbourg, Rick Hobbs, David Hodge, Mark Hodges, James W. Lamb, Paul Rasmussen, Myles B. Sherman, Jun Shi, Dana Simard, Reynier Squillace, Sander Weinreb, David P. Woody and Nitika Yadlapalli Yurk
Fast radio bursts (FRBs) are a powerful and mysterious new class of transients that are luminous enough to be detected at cosmological distances. By associating FRBs to host galaxies, we can measure intrinsic and environmental properties that test FRB origin models, in addition to using them as precise probes of distant cosmic gas. The Deep Synoptic Array (DSA-110) is a radio interferometer built to
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Lyα Emission at z = 7–13: Clear Evolution of Lyα Equivalent Width Indicating a Late Cosmic Reionization History Astrophys. J. (IF 4.9) Pub Date : 2024-05-14 Minami Nakane, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Yoshiaki Ono, Hiroya Umeda, Yuki Isobe, Yechi Zhang and Yi Xu
We present the evolution of Lyα emission derived from 53 galaxies at z = 6.6–13.2, which have been identified by multiple JWST/NIRSpec spectroscopy programs of Early Release Science, General Observer, Director's Discretionary Time, and Guaranteed Time Observations. These galaxies fall on the star formation main sequence and are typical star-forming galaxies with UV magnitudes of −22.5 ≤ MUV ≤ −17.0
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Study of the Observation Sensitivity of Gamma-Ray Bursts for the HADAR Project Astrophys. J. (IF 4.9) Pub Date : 2024-05-14 Zi-hao Zhang, Tian-Lu Chen, You-Liang Feng, Yi-Qing Guo, Yu-Hua Yao, Cheng Liu, Yang-Zhao Ren, Heng-Jiao Liu, Hong-Bo Hu, Qi-Ling Chen, Guang-Guang Xin, Yi Zhang and Qiang Yuan
The High Altitude Detection of Astronomical Radiation (HADAR) is a novel wide-field Cherenkov Telescope. It is designed for gamma-ray astronomy in the energy range of 10 GeV to 100 TeV, with gamma-ray bursts (GRBs) being one of its primary research focuses. To assess its complementary capabilities, this study first presents the Crab sensitivity of HADAR. Then, to compare the sensitivity of GRBs, the
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Exploring the Mpc Environment of the Quasar ULAS J1342+0928 at z = 7.54 Astrophys. J. (IF 4.9) Pub Date : 2024-05-14 Sofía Rojas-Ruiz, Chiara Mazzucchelli, Steven L. Finkelstein, Eduardo Bañados, Emanuele Paolo Farina, Bram P. Venemans, Roberto Decarli, Chris J. Willott, Feige Wang, Fabian Walter, Enrico Congiu, Gabriel Brammer and Peter Zeidler
Theoretical models predict that z ≳ 6 quasars are hosted in the most massive halos of the underlying dark matter distribution and thus would be immersed in protoclusters of galaxies. However, observations report inconclusive results. We investigate the 1.1 proper-Mpc2 environment of the z = 7.54 luminous quasar ULAS J1342+0928. We search for Lyman-break galaxy (LBG) candidates using deep imaging from
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Evidence of a Strong 19.5 Hz Flux Oscillation in Swift BAT and Fermi GBM Gamma-Ray Data from GRB 211211A Astrophys. J. (IF 4.9) Pub Date : 2024-05-14 Cecilia Chirenti, Simone Dichiara, Amy Lien and M. Coleman Miller
The gamma-ray burst (GRB) GRB 211211A is believed to have occurred due to the merger of two neutron stars or a neutron star and a black hole, despite its duration of more than a minute. Subsequent analysis has revealed numerous interesting properties including the possible presence of a ∼22 Hz quasiperiodic oscillation (QPO) during precursor emission. Here we perform timing analysis of Fermi and Swift
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Sizes of Active Galactic Nucleus Inhomogeneous Disks—Large in Microlensing, Small in Reverberation Mapping Astrophys. J. (IF 4.9) Pub Date : 2024-05-14 Guowei Ren, Mouyuan Sun, Jun-Xian Wang and Zhen-Yi Cai
Magnetohydrodynamic turbulence can drive significant temperature fluctuations in the accretion disk of an active galactic nucleus (AGN). As a result, the disk can be highly inhomogeneous and has a half-light radius larger than the static Shakura and Sunyaev disk (SSD), in agreement with quasar microlensing observations. Meanwhile, the accretion-disk sizes can also be determined using continuum reverberation
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The Evolution of Accreting Binaries: From Brown Dwarfs to Supermassive Black Holes Astrophys. J. (IF 4.9) Pub Date : 2024-05-12 Alexander J. Dittmann and Geoffrey Ryan
Circumbinary accretion occurs throughout the universe, from the formation of stars and planets to the aftermath of major galactic mergers. We present an extensive investigation of circumbinary accretion disks, studying circular binaries with mass ratios (q ≡ M2/M1) from 0.01 to 1 and at each mass ratio probing the effects of disk thickness and viscosity. We study disks with aspect ratios H/r ∈ {0.1
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Spectral distortion signatures of step-like inflationary potential J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Jorge Mastache, Wilson Barrera and Raúl Henríquez-Ortiz
In this work, we analyze a power-law inflationary potential enhanced with a step that can introduce features in the primordial power spectrum. We focus on the computation of the Spectral Distortions (SD) induced by these features obtained from the inflationary dynamics. In this scenario, we explore the potential of upcoming experimental missions like PIXIE to detect the SD of the model within a power
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Quantum gravity effects on fermionic dark matter and gravitational waves J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Stephen F. King, Rishav Roshan, Xin Wang, Graham White and Masahito Yamazaki
We explore the phenomenological consequences of breaking discrete global symmetries in quantum gravity (QG). We extend a previous scenario where discrete global symmetries are responsible for scalar dark matter (DM) and domain walls (DWs), to the case of fermionic DM, considered as a feebly interacting massive particle, which achieves the correct DM relic density via the freeze-in mechanism. Due to
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Rescuing gravitational-reheating in chaotic inflation J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Basabendu Barman, Nicolás Bernal and Javier Rubio
We show, within the single-field inflationary paradigm, that a linear non-minimal interaction ξ M P ϕ R between the inflaton field ϕ and the Ricci scalar R can result in successful inflation that concludes with an efficient heating of the Universe via perturbative decays of the inflaton, aided entirely by gravity. Considering the inflaton field to oscillate in a quadratic potential, we find that 𝒪(10-1)
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Gravitational radiation from eccentric binary black hole system in dynamical Chern-Simons gravity J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Zhao Li, Jin Qiao, Tan Liu, Rui Niu, Shaoqi Hou, Tao Zhu and Wen Zhao
Dynamical Chern-Simons (DCS) gravity, a typical parity-violating gravitational theory, modifies both the generation and propagation of gravitational waves from general relativity (GR). In this work, we derive the gravitational waveform radiated from a binary slowly-rotating black hole system with eccentric orbits under the spin-aligned assumption in the DCS theory. Compared with GR, DCS modification
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Hamiltonian for Weyl transverse gravity J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 J. Klusoň
In this short note we determine Hamiltonian for Weyl transverse gravity. We find primary, secondary and tertiary constraints and calculate Poisson brackets between them. We also show that gauge fixing in Weyl transverse gravity leads to the Hamiltonian for unimodular gravity.
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How robust are gravitational wave predictions from cosmological phase transitions? J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Peter Athron, Lachlan Morris and Zhongxiu Xu
Gravitational wave (GW) predictions of cosmological phase transitions are almost invariably evaluated at either the nucleation or percolation temperature. We investigate the effect of the transition temperature choice on GW predictions, for phase transitions with weak, intermediate and strong supercooling. We find that the peak amplitude of the GW signal varies by a factor of a few for weakly supercooled
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A Minkowski functional analysis of the Cosmic Microwave Background weak lensing convergence J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Jan Hamann and Yuqi Kang
Minkowski functionals are summary statistics that capture the geometric and morphological properties of fields. They are sensitive to all higher order correlations of the fields and can be used to complement more conventional statistics, such as the power spectrum of the field. We develop a Minkowski functional-based approach for a full likelihood analysis of mildly non-Gaussian sky maps with partial
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Mock data sets for the Eboss and DESI Lyman-α forest surveys J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Thomas Etourneau, Jean-Marc Le Goff, James Rich, Ting Tan, Andrei Cuceu, S. Ahlen, E. Armengaud, D. Brooks, T. Claybaugh, A. de la Macorra, P. Doel, A. Font-Ribera, J.E. Forero-Romero, S.Gontcho A. Gontcho, A.X. Gonzalez-Morales, H.K. Herrera-Alcantar, K. Honscheid, T. Kisner, M. Landriau, M. Manera, P. Martini, R. Miquel, A. Muñoz-Gutiérrez, J. Nie, I. Pérez-Ràfols, C. Poppett, C. Ravoux, M. Rezaie
We present a publicly-available code to generate sets of mock Lyman-α (Lyα) forest data that have realistic large-scale correlations including those due to the Baryonic Acoustic Oscillations (BAO). The primary purpose of these mocks is to test the analysis procedures of the Extended Baryon Oscillation Survey (eBOSS) and the Dark Energy Spectroscopy Instrument (DESI) surveys. The transmitted flux fraction
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Scaling solutions as Early Dark Energy resolutions to the Hubble tension J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Edmund J. Copeland, Adam Moss, Sergio Sevillano Muñoz and Jade M.M. White
A wide class of scalar field models including Quintessence and K-essence have the attractive property of tracker regimes, where the energy density stored in the field evolves so as to mimic that of the dominant background component. During this evolution, for a brief period of time, there is an increase in the energy density of the field as it spirals in towards its attractor solution. We show that
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Wide binaries and modified gravity (MOG) J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 J.W. Moffat
Wide binary stars are used to test the modified gravity called Scalar-Tensor-Vector Gravity or MOG. This theory is based on the additional gravitational degrees of freedom, the scalar field G = GN(1+α), where GN is Newton's constant, and the massive (spin-1 graviton) vector field ϕμ. The wide binaries have separations of 2–30 kAU. The MOG acceleration law, derived from the MOG field equations and equations
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A self-similar model of galaxy formation and dark halo relaxation J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Premvijay Velmani and Aseem Paranjape
We develop a spherical self-similar model for the formation of a galaxy through gas collapsing in an isolated self-gravitating dark matter halo. As is well known, the self-similarity assumption makes the problem eminently tractable by reducing it to a system of ordinary differential equations. We improve upon the existing literature on self-similar collapse in two ways. First, we include the effects
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LiteBIRD and CMB-S4 sensitivities to reheating in plateau models of inflation J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Marco Drewes, Lei Ming and Isabel Oldengott
We study the sensitivity of LiteBIRD and CMB-S4 to the reheating temperature and the inflaton coupling in three types of plateau-potential models of inflation, namely mutated hilltop inflation, radion gauge inflation, and α-attractor T models. We first find relations between model parameters and CMB observables in all models. We then perform Monte Carlo Markov Chain based forecasts to quantify the
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Constraints on non-Gaussian primordial curvature perturbation from the LIGO-Virgo-KAGRA third observing run J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 Ryoto Inui, Santiago Jaraba, Sachiko Kuroyanagi and Shuichiro Yokoyama
The scalar-induced gravitational wave (SIGWs), arising from large amplitude primordial density fluctuations, provide a unique observational test for directly probing the epoch of inflation. In this work, we provide constraints on the SIGW background by taking into account the non-Gaussianity in the primordial density fluctuations, using the first three observing runs (O1-O3) data of the LIGO-Virgo-KAGRA
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Suppression of matter density growth at scales exceeding the cosmic screening length J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-05-13 M. Eingorn, E. Yilmaz, A.E. Yükselci and A. Zhuk
One of the main objectives of modern cosmology is to explain the origin and evolution of cosmic structures at different scales. The principal force responsible for the formation of such structures is gravity. In a general relativistic framework, we have shown that matter density contrasts do not grow over time at scales exceeding the cosmic screening length, which corresponds to a cosmological scale
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The Cause of the Difference in the Propagation Distances between Compact and Transient Jets in Black Hole X-Ray Binaries Astrophys. J. Lett. (IF 7.9) Pub Date : 2024-05-14 Andrzej A. Zdziarski and Sebastian Heinz
Accreting black hole binaries change their properties during evolution, passing through two main luminous states, dominated by either hard or soft X-rays. In the hard state, steady compact jets emitting multiwavelength radiation are present. Those jets are usually observed in radio, and when resolved, their extent is ≲1015 cm. Then, during hard-to-soft transitions, powerful ejecta in the form of blobs
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The SRG/eROSITA All-Sky Survey Astron. Astrophys. (IF 6.5) Pub Date : 2024-05-15 E. Bulbul, A. Liu, M. Kluge, X. Zhang, J. S. Sanders, Y. E. Bahar, V. Ghirardini, E. Artis, R. Seppi, C. Garrel, M. E. Ramos-Ceja, J. Comparat, F. Balzer, K. Böckmann, M. Brüggen, N. Clerc, K. Dennerl, K. Dolag, M. Freyberg, S. Grandis, D. Gruen, F. Kleinebreil, S. Krippendorf, G. Lamer, A. Merloni, K. Migkas, K. Nandra, F. Pacaud, P. Predehl, T. H. Reiprich, T. Schrabback, A. Veronica, J. Weller,
Clusters of galaxies can be used as powerful probes to study astrophysical processes on large scales, test theories of the growth of structure, and constrain cosmological models. The driving science goal of the SRG/eROSITA All-Sky Survey is to assemble a large sample of X-ray clusters with a well-defined selection function to determine the evolution of the mass function and, hence, the cosmological
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Determining the Nanoflare Heating Frequency of an X-Ray Bright Point Observed by MaGIXS Astrophys. J. (IF 4.9) Pub Date : 2024-05-13 Biswajit Mondal, P. S. Athiray, Amy R. Winebarger, Sabrina L. Savage, Ken Kobayashi, Stephen Bradshaw, Will Barnes, Patrick R. Champey, Peter Cheimets, Jaroslav Dudík, Leon Golub, Helen E. Mason, David E. McKenzie, Christopher S. Moore, Chad Madsen, Katharine K. Reeves, Paola Testa, Genevieve D. Vigil, Harry P. Warren, Robert W. Walsh and Giulio Del Zanna
Nanoflares are thought to be one of the prime candidates that can heat the solar corona to its multimillion kelvin temperature. Individual nanoflares are difficult to detect with the present generation of instruments, but their presence can be inferred by comparing simulated nanoflare-heated plasma emissions with the observed emission. Using HYDRAD coronal loop simulations, we model the emission from
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Resolved Near-infrared Stellar Photometry from the Magellan Telescope for 13 Nearby Galaxies: J-region Asymptotic Giant Branch Method Distances Astrophys. J. (IF 4.9) Pub Date : 2024-05-13 Abigail J. Lee, Andrew J. Monson, Wendy L. Freedman, Barry F. Madore, Kayla A. Owens, Rachael L. Beaton, Coral Espinoza, Tongtian Ren and Yi Ren
We present near-infrared JHK photometry for the resolved stellar populations in 13 nearby galaxies: NGC 6822, IC 1613, NGC 3109, Sextans B, Sextans A, NGC 300, NGC 55, NGC 7793, NGC 247, NGC 5253, Cen A, NGC 1313, and M83, acquired from the 6.5 m Baade–Magellan telescope. We measure distances to each galaxy using the J-region asymptotic giant branch (JAGB) method, a new standard candle that leverages
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Dissipative Dark Substructure: The Consequences of Atomic Dark Matter on Milky Way Analog Subhalos Astrophys. J. (IF 4.9) Pub Date : 2024-05-13 Caleb Gemmell, Sandip Roy, Xuejian Shen, David Curtin, Mariangela Lisanti, Norman Murray and Philip F. Hopkins
Using cosmological hydrodynamical zoom-in simulations, we explore the properties of subhalos in Milky Way analogs that contain a subcomponent of atomic dark matter (ADM). ADM differs from cold dark matter (CDM) due to the presence of self-interactions that lead to energy dissipation, analogous to standard model baryons. This model can arise in dark sectors that are natural and theoretically motivated
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Optical Spectroscopy of Type Ia Supernovae by the Carnegie Supernova Projects I and II Astrophys. J. (IF 4.9) Pub Date : 2024-05-13 N. Morrell, M. M. Phillips, G. Folatelli, M. D. Stritzinger, M. Hamuy, N. B. Suntzeff, E. Y. Hsiao, F. Taddia, C. R. Burns, P. Hoeflich, C. Ashall, C. Contreras, L. Galbany, J. Lu, A. L. Piro, J. Anais, E. Baron, A. Burrow, L. Busta, A. Campillay, S. Castellón, C. Corco, T. Diamond, W. L. Freedman, C. Gonzalez, K. Krisciunas, S. Kumar, S. E. Persson, J. Serón, M. Shahbandeh, S. Torres, S. A. Uddin
We present the second and final release of optical spectroscopy of Type Ia supernovae (SNe Ia) obtained during the first and second phases of the Carnegie Supernova Project (CSP-I and CSP-II). The newly released data consist of 148 spectra of 30 SNe Ia observed in the course of CSP-I and 234 spectra of 127 SNe Ia obtained during CSP-II. We also present 216 optical spectra of 46 historical SNe Ia, including
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Parametric Decay of a Kinked Alfvén Wave Packet: 3D Magnetohydrodynamic Simulations Astrophys. J. (IF 4.9) Pub Date : 2024-05-13 Maile Marriott and Anna Tenerani
Large amplitude Alfvénic fluctuations, sometimes leading to localized inversions of the magnetic field, called switchbacks, are a common but poorly understood phenomenon in the solar wind. In particular, their origin(s), evolution, and stability within solar wind conditions are yet to be fully understood. Simulations modeling switchbacks have previously studied their stability in 2D. Here, we investigate
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Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique. II. Curved Magnetic Field in kpc-scale Bubble of NGC 628 Astrophys. J. (IF 4.9) Pub Date : 2024-05-13 Mengke Zhao, Jianjun Zhou, Willem A. Baan, Yue Hu, A. Lazarian, Xindi Tang, Jarken Esimbek, Yuxin He, Dalei Li, Weiguang Ji, Zhengxue Chang and Kadirya Tursun
We report the detection of the ordered alignment between the magnetic field and kpc-scale bubbles in the nearby spiral galaxy, NGC 628. Applying the Velocity Gradient Technique on CO spectroscopic data from the ALMA-PHANGS, the magnetic field of NGC 628 is measured at the scale of 191 pc (∼4″). The large-scale magnetic field is oriented parallel to the spiral arms and curves around the galactic bubble
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Evolutionary Origin of Ultralong-period Radio Transients Astrophys. J. (IF 4.9) Pub Date : 2024-05-13 Yun-Ning Fan, Kun Xu and Wen-Cong Chen
Recently, two ultralong-period radio transients, GLEAM-X J162759.5-523504.3 (J1627) and GPM J1839-10 (J1839), were discovered with spin periods longer than 1000 s. The origin of these two ultralong-period radio transients is intriguing in understanding the spin evolution of neutron stars (NSs). In this work, we examine whether the interaction between strong magnetized NSs and fallback disks can spin
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Photometric Objects Around Cosmic Webs (PAC). VI. High Satellite Fraction of Quasars Astrophys. J. (IF 4.9) Pub Date : 2024-05-13 Shanquan Gui, Kun Xu, Y. P. Jing, Donghai Zhao and Hongyu Gao
The Photometric objects Around Cosmic webs (PAC) approach developed in Xu et al. has the advantage of making full use of spectroscopic and deeper photometric surveys. With the merits of PAC, the excess surface density of neighboring galaxies can be measured down to stellar mass 1010.80M⊙ around quasars at redshift 0.8 < zs < 1.0, with the data from the Sloan Digital Sky Survey IV extended Baryon Oscillation