Black holes on FIRE: stellar feedback limits early feeding of galactic nuclei
Black holes on FIRE: stellar feedback limits early feeding of galactic nuclei
复制标题
DOI：
10.1093/mnrasl/slx161
复制
发表时间：
2017-07
影响因子：
4.8
通讯作者：
D. Angl'es-Alc'azar;C. Faucher-Giguère;E. Quataert;P. Hopkins;R. Feldmann;P. Torrey;A. Wetzel;
中科院分区：
文献类型：
--
作者：
D. Angl'es-Alc'azar;C. Faucher-Giguère;E. Quataert;P. Hopkins;R. Feldmann;P. Torrey;A. Wetzel;
我们在现实环境反馈（FIRE）项目中引入了大质量黑洞（BHs），并对低至z = 1的类星体质量晕[Mhalo(z = 2)≈1012.5 M⊙]进行了高分辨率的宇宙流体动力学模拟。这些模拟通过超新星、恒星风和辐射以及黑洞的增长来模拟恒星反馈，使用基于引力扭矩的处方，该处方与星系核的解析特性有关。我们不包括BH反馈。我们发现早期的黑洞生长发生在短的（小于1 Myr）吸积阶段，可以达到甚至超过Eddington速率。在这种情况下，黑洞的增长受到恒星反馈的限制，这些恒星反馈不断地从星系核中疏散气体，相对于本地的黑洞-黑洞形成，黑洞在低质量星系中仍然是质量不足的。黑洞的增长在后来的时间里更有效，当核恒星的潜力保留了一个重要的气体储层，恒星形成变得不那么突然，星系进入一个更有序的状态。当宿主达到Mbulge ~ 1010 M⊙时，黑洞迅速收敛到观测到的标度关系。我们表明，解决恒星反馈对星系内部~ 100pc的气体供应的影响对于准确捕捉中心黑洞的生长是必要的。我们的模拟表明，恒星爆炸反馈对黑洞-星系关系、AGN人口统计和时间变化、早期类星体的形成和大质量黑洞合并具有重要意义。
We introduce massive black holes (BHs) in the Feedback In Realistic Environments (FIRE) project and perform high-resolution cosmological hydrodynamic simulations of quasar-mass haloes [Mhalo(z = 2) ≈ 1012.5 M⊙] down to z = 1. These simulations model stellar feedback by supernovae, stellar winds and radiation, and BH growth using a gravitational torque-based prescription tied to the resolved properties of galactic nuclei. We do not include BH feedback. We show that early BH growth occurs through short (≲1 Myr) accretion episodes that can reach or even exceed the Eddington rate. In this regime, BH growth is limited by bursty stellar feedback continuously evacuating gas from galactic nuclei, and BHs remain undermassive in low-mass galaxies relative to the local MBH–Mbulgerelation. BH growth is more efficient at later times, when the nuclear stellar potential retains a significant gas reservoir, star formation becomes less bursty and galaxies settle into a more ordered state. BHs rapidly converge on to the observed scaling relations when the host reaches Mbulge ∼ 1010 M⊙. We show that resolving the effects of stellar feedback on the gas supply in the inner ∼100 pc of galaxies is necessary to accurately capture the growth of central BHs. Our simulations imply that bursty stellar feedback has important implications for BH–galaxy relations, AGN demographics and time variability, the formation of early quasars and massive BH mergers.