星系和星系团中热气体的温度：重子随着暗物质的曲调起舞
The temperature of hot gas in galaxies and clusters: baryons dancing to the tune of dark matter
摘要：
星系和星系团中热气体的温度分布在很大程度上取决于总引力势的深度，从而取决于暗物质（DM）的分布。我们使用高分辨率的流体动力学模拟的星系形成推导出一个令人惊讶的简单的气体温度和DM属性之间的关系。我们表明，这种关系不仅适用于星系团，但也为平衡和放松星系的半径超过中央恒星占主导地位的地区，通常是几千秒差距。然后阐明如何测量的温度和密度的热气体成分可以导致间接测量DM速度各向异性的星系。我们还研究了存在自调节、周期性活动星系核（AGN）的星系团的温度关系，并证明这种温度关系甚至在具有活动星系核的星系团的30 kpc内区之外也成立。
英文摘要：
The temperature profile of hot gas in galaxies and galaxy clusters is largely determined by the depth of the total gravitational potential and thereby by the dark matter (DM) distribution. We use high-resolution hydrodynamical simulations of galaxy formation to derive a surprisingly simple relation between the gas temperature and DM properties. We show that this relation holds not just for galaxy clusters but also for equilibrated and relaxed galaxies at radii beyond the central stellar-dominated region of typically a few kpc. It is then clarified how a measurement of the temperature and density of the hot gas component can lead to an indirect measurement of the DM velocity anisotropy in galaxies. We also study the temperature relation for galaxy clusters in the presence of self-regulated, recurrent active galactic nuclei (AGN), and demonstrate that this temperature relation even holds outside the inner region of 30 kpc in clusters with an active AGN.
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。
