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Observational Signatures of Dust Traffic Jams in Polar-aligning Circumbinary Disks
The Astrophysical Journal Letters ( IF 8.8 ) Pub Date : 2024-11-27 , DOI: 10.3847/2041-8213/ad8faf Jeremy L. Smallwood, Rebecca Nealon, Hsi-Wei Yen, Christophe Pinte, Cristiano Longarini, Hossam Aly, Min-Kai Lin
The Astrophysical Journal Letters ( IF 8.8 ) Pub Date : 2024-11-27 , DOI: 10.3847/2041-8213/ad8faf Jeremy L. Smallwood, Rebecca Nealon, Hsi-Wei Yen, Christophe Pinte, Cristiano Longarini, Hossam Aly, Min-Kai Lin
Misaligned circumbinary disks will produce dust traffic jams during alignment or antialignment to the binary orbital plane. We conduct a hydrodynamical simulation of an initially misaligned circumbinary disk undergoing polar alignment with multiple dust species. Due to differential precession between the gas and dust components, multiple dust traffic jams are produced within the disk during polar alignment. The radial locations of the dust traffic jams depend on the Stokes number of the grains, which depends on grain size. We compute the dust temperature structure using postprocessing radiative transfer to produce continuum images at centimeter wavelengths. Multiple distinct rings emerge in the continuum images, corresponding to the dust traffic jams. The angular resolution of upcoming observations from the Square Kilometre Array and the next-generation Very Large Array will be sufficient to detect centimeter-sized grains in protoplanetary disks and resolve the widths of dust traffic jams. Therefore, dust traffic jams resulting from the differential precession of gas and dust in misaligned circumbinary disks will be a prime target for more extended wavelength observations.
中文翻译:
极对准环二星盘中尘埃交通堵塞的观测特征
未对准的圆盘将在对准或反对准双星轨道平面期间产生尘埃交通拥堵。我们对最初未对准的环二星盘进行流体动力学模拟,该圆盘与多种尘埃种类发生极性对准。由于气体和粉尘成分之间的进动不同,在极轴对准过程中,圆盘内会产生多个粉尘交通堵塞。粉尘交通堵塞的径向位置取决于颗粒的斯托克斯数,而斯托克斯数又取决于颗粒大小。我们使用后处理辐射传输来计算尘埃温度结构,以产生厘米波长的连续图像。连续图像中出现多个不同的环,对应于灰尘交通拥堵。平方公里阵列和下一代甚大阵列即将进行的观测的角度分辨率将足以探测原行星盘中厘米级的颗粒,并解决尘埃交通拥堵的宽度问题。因此,由于气体和尘埃在未对准的环二元盘中的差异进动而导致的尘埃交通拥堵将成为更扩展波长观测的主要目标。
更新日期:2024-11-27
中文翻译:
极对准环二星盘中尘埃交通堵塞的观测特征
未对准的圆盘将在对准或反对准双星轨道平面期间产生尘埃交通拥堵。我们对最初未对准的环二星盘进行流体动力学模拟,该圆盘与多种尘埃种类发生极性对准。由于气体和粉尘成分之间的进动不同,在极轴对准过程中,圆盘内会产生多个粉尘交通堵塞。粉尘交通堵塞的径向位置取决于颗粒的斯托克斯数,而斯托克斯数又取决于颗粒大小。我们使用后处理辐射传输来计算尘埃温度结构,以产生厘米波长的连续图像。连续图像中出现多个不同的环,对应于灰尘交通拥堵。平方公里阵列和下一代甚大阵列即将进行的观测的角度分辨率将足以探测原行星盘中厘米级的颗粒,并解决尘埃交通拥堵的宽度问题。因此,由于气体和尘埃在未对准的环二元盘中的差异进动而导致的尘埃交通拥堵将成为更扩展波长观测的主要目标。