论文标题
Illustristng和X射线观测中的超级质量黑洞与热气气氛之间的相关性
Correlations between supermassive black holes and hot gas atmospheres in IllustrisTNG and X-ray observations
论文作者
论文摘要
最近的X射线观察结果表明，中央超级黑洞（SMBH）的质量与热气渗透到宿主星系的X射线特性之间存在显着相关性，从而表明大气气体在追踪SMBH生长中的至关重要的作用。我们使用Illustristng宇宙学模拟从理论上研究了这个话题，并为这种SMBH的性质提供了见解 - 气态光环连接。 By carrying out a mock X-ray analysis for a mass-selected sample of TNG100 simulated galaxies at $z=0$, we inspect the relationship between the masses of SMBHs and the hot gas temperatures and luminosities at various spatial and halo scales -- from galactic ($\sim R_{\rm e}$) to group/cluster scales ($\sim R_{\rm 500C} $）。我们发现强烈的SMBH-X射线相关性主要在淬火星系中，发现相关性在较大的半径上变得更强大。至关重要的是，大radii（$ k _ {\ rm b} t _ {\ rm x} $）在大radii（$ r \ gtrsim5r _ {\ rm e} $）捕获SMBH质量的smbh质量，具有非常小的散布（$ \ sim0.2 $ dex）。 Illustristng出现的关系与从最近的X射线观测值获得的关系一致。总体而言，我们的分析表明，在Illustristng的框架内，当前的时间$ m _ {\ rm bh} -k _ {\ rm b} t_ {x} $相关性在高质量结束时在如此高的质量下，结构的层次组装设置。然而，这些缩放关系的确切形式，基因座和散布对反馈过程（例如由恒星形成和SMBH活性驱动的反馈过程）敏感。
Recent X-ray observations have revealed remarkable correlations between the masses of central supermassive black holes (SMBHs) and the X-ray properties of the hot atmospheres permeating their host galaxies, thereby indicating the crucial role of the atmospheric gas in tracing SMBH growth in the high-mass regime. We examine this topic theoretically using the IllustrisTNG cosmological simulations and provide insights to the nature of this SMBH -- gaseous halo connection. By carrying out a mock X-ray analysis for a mass-selected sample of TNG100 simulated galaxies at $z=0$, we inspect the relationship between the masses of SMBHs and the hot gas temperatures and luminosities at various spatial and halo scales -- from galactic ($\sim R_{\rm e}$) to group/cluster scales ($\sim R_{\rm 500c}$). We find strong SMBH-X-ray correlations mostly in quenched galaxies and find that the correlations become stronger and tighter at larger radii. Critically, the X-ray temperature ($k_{\rm B}T_{\rm X}$) at large radii ($r\gtrsim5R_{\rm e}$) traces the SMBH mass with a remarkably small scatter ($\sim0.2$ dex). The relations emerging from IllustrisTNG are broadly consistent with those obtained from recent X-ray observations. Overall, our analysis suggests that, within the framework of IllustrisTNG, the present-time $M_{\rm BH}-k_{\rm B}T_{X}$ correlations at the high-mass end ($M_{\rm BH}\gtrsim 10^8 M_\odot$) are fundamentally a reflection of the SMBH mass -- halo mass relation, which at such high masses is set by the hierarchical assembly of structures. The exact form, locus, and scatter of those scaling relations are, however, sensitive to feedback processes such as those driven by star formation and SMBH activity.
