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arXiv 2510.01320hep-phastro-ph.COastro-ph.HE
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人马座A*周围的暗拖曳效应

Dark Drag Around Sagittarius A*

Particle Theory Group, SLAC National Accelerator Laboratory(粒子理论组,SLAC国家加速器实验室);Department of Physics and Astronomy, University of Victoria(物理与天文学系,维多利亚大学);TRIUMF;Kavli Institute for Particle Astrophysics and Cosmology, Stanford University(卡弗里粒子天体物理学与宇宙学研究所,斯坦福大学)

Javier F. Acevedo, Aidan J. Reilly, Lillian Santos-Olmsted

AI总结:

该研究分析了暗物质与标准模型的非引力相互作用对人马座A*附近天体的轨道影响,确定了受暗拖曳影响显著的天体类型,对暗物质分布和相互作用强度施加了约束,还发现其或可解释银河系内区红巨星分支恒星的耗尽。

摘要:

我们分析了暗物质(DM)与标准模型(SM)的非引力相互作用对超大质量黑洞人马座A*附近天体轨道动力学的影响,该区域的暗物质密度通常很高。我们阐明了DM-SM散射通道会在该区域天体上产生拖曳力的条件,并表明当散射截面足够大时,该效应可导致轨道衰减,时标短至一个轨道周期。我们确定了受此暗拖曳影响最显著的天体类型,并在假设弹性散射和非弹性散射的情况下,对特定暗物质分布和相互作用强度施加了约束。对于非弹性暗物质,我们发现其对质量分裂的灵敏度可达MeV量级。我们还证明,暗物质诱导的拖曳力可能有助于解释银河系最内区域观测到的红巨星分支恒星的耗尽现象。

英文摘要:

We analyze the effect of Dark Matter (DM) - Standard Model (SM) non-gravitational interactions on the orbital dynamics of celestial bodies near the supermassive black hole Sagittarius A*, where the DM density is generically expected to be high. We outline the conditions under which a DM-SM scattering channel gives rise to a drag force on objects in this region, and show that for sufficiently large cross-sections, this effect can lead to observable orbital decay on timescales as short as a single orbital period. We identify the types of objects most strongly affected by this dark drag and place constraints on specific dark matter distributions and interaction strengths, assuming both elastic and inelastic scattering. For inelastic DM, we find sensitivity to mass splittings that reach the MeV scale. We also demonstrate that a DM-induced drag force could potentially contribute to the observed depletion of red giant branch stars in the innermost region of the Milky Way.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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