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arXiv 2412.04553astro-ph.GA
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关于黑洞在淬灭恒星质量函数上的印记

On the signature of black holes on the quenched stellar mass function

Antonio J. Porras-Valverde, John C. Forbes

AI总结:

本文发现黑洞质量弥散显著影响淬灭中心恒星质量函数的低质量端斜率,弥散越大斜率越浅,并通过与观测对比给出黑洞质量弥散下限及对AGN反馈和星系-黑洞共同演化的联合约束。

摘要:

当恒星形成星系接近或超过约 $10^{11} M_\odot$ 的恒星质量时,它们越来越可能在一个通常被称为质量淬灭的过程中被淬灭。中心星系通过质量而非环境淬灭被淬灭,因此会在这一特征质量附近累积形成一个峰。虽然许多过程可能影响淬灭中心恒星质量函数(QCSMF)的形状,但我们发现其低质量端斜率受到给定恒星质量下黑洞质量弥散的强烈影响,黑洞群体中更高的弥散会产生更浅的斜率。黑洞质量中更高的弥散会扩展淬灭发生的恒星质量范围,从而导致更浅的斜率。这一趋势在多种半解析模型和宇宙学流体动力学模拟中均成立。与观测结果的比较为黑洞质量存在较大弥散 $σ(\log_{10}(M_\mathrm{BH})|M_*) \gtrsim 0.5$ dex 提供了间接证据,并对活动星系核反馈物理以及星系与黑洞的共同演化给出了联合约束。

英文摘要:

As star-forming galaxies approach or exceed a stellar mass around $10^{11} M_\odot$, they are increasingly likely to be quenched in a process generically called mass quenching. Central galaxies, which are quenched via mass rather than environmental quenching, therefore accumulate in a peak around this characteristic mass. While a number of processes may influence the shape of the quenched central stellar mass function (QCSMF), we find that its low-mass slope is strongly affected by the scatter in the mass of black holes at a given stellar mass, with higher scatters in the black hole population yielding shallower slopes. Higher scatters in the black hole mass spread out the stellar mass range over which quenching occurs, leading to shallower slopes. This trend holds across a variety of semi-analytic models and cosmological hydrodynamic simulations. A comparison with observations provides indirect evidence for a large scatter in black hole mass $σ(\log_{10}(M_\mathrm{BH})|M_*) \gtrsim 0.5$ dex, and a joint constraint on AGN feedback physics and the co-evolution of galaxies and black holes.

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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