<br>稳定的传质和恒星风对引力波源形成的重要性,Monthly Notices of the Royal Astronomical Society

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稳定的传质和恒星风对引力波源形成的重要性
Monthly Notices of the Royal Astronomical Society ( IF 4.7 ) Pub Date : 2024-01-14 , DOI: 10.1093/mnras/stae152
Andris Dorozsmai ₁ , Silvia Toonen _{1,

2}

Affiliation

大量的引力波（GW）探测揭示了合并黑洞双星群的特性，但这种系统是如何形成的仍然存在很大争议。了解恒星物理学对可观测 GW 种群的影响，将有助于阐明我们如何使用 GW 数据以及其他观测数据来限制对大规模双星的演化知之甚少。我们使用种群合成代码 seba 对经典孤立的双星形成通道进行了参数研究，以研究合并双黑洞种群的性质对与第一阶段传质和恒星风相关的不确定性的敏感性。我们改变了五个假设：（1）和（2）第一传质阶段的传质效率和角动量损失，（3）具有辐射包络的巨型供体的传质稳定性标准，（4）演化恒星形成深对流包络的有效温度，以及（5）恒星风的质量损失率。我们发现，当前与传质第一阶段相关的不确定性对不同主要通道的相对重要性有巨大影响，而 GW 源的可观察人口统计数据没有受到显著影响。我们不同的参数对 GW 源的种群特性具有复杂、相互关联的影响。因此，鉴于我们当前模型的巨大不确定性，仅从 GW 数据推断大量双星物理学仍然极具挑战性。

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Importance of stable mass transfer and stellar winds for the formation of gravitational wave sources

The large number of gravitational wave (GW) detections have revealed the properties of the merging black hole binary population, but how such systems are formed is still heavily debated. Understanding the imprint of stellar physics on the observable GW population will shed light on how we can use the GW data, along with other observations, to constrain the poorly understood evolution of massive binaries. We perform a parameter study on the classical isolated binary formation channel with the population synthesis code seba to investigate how sensitive the properties of the coalescing binary black hole population are on the uncertainties related to first phase of mass transfer and stellar winds. We vary five assumptions: (1) and (2) the mass transfer efficiency and the angular momentum loss during the first mass transfer phase, (3) the mass transfer stability criteria for giant donors with radiative envelopes, (4) the effective temperature at which an evolved star develops a deep convective envelope, and (5) the mass-loss rates of stellar winds. We find that current uncertainties related to first phase of mass transfer have a huge impact on the relative importance of different dominant channels, while the observable demographics of GW sources are not significantly affected. Our varied parameters have a complex, interrelated effect on the population properties of GW sources. Therefore, inference of massive binary physics from GW data alone remains extremely challenging, given the large uncertainties in our current models.

更新日期：2024-01-14

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