论文标题
高红移时大型黑洞及其宿主星系的共同进化：六个宇宙学模拟的差异和JWST的关键作用
Co-evolution of massive black holes and their host galaxies at high redshift: discrepancies from six cosmological simulations and the key role of JWST
论文作者
论文摘要
詹姆斯·韦伯（James Webb）太空望远镜将有能力以空前的深度和空间分辨率来表征Z> 6的高红色类星体。 While the brightest quasars at such redshift (i.e., with bolometric luminosity L_bol> 10^46 erg/s) provide us with key information on the most extreme objects in the Universe, measuring the black hole (BH) mass and Eddington ratios of fainter quasars with L_bol= 10^45-10^46 erg/s opens a path to understand the build-up of more normal BHs at z>6.在本文中，我们表明Illustris，TNG100，TNG300，Horizon-Agn，Eagle和Simba大规模宇宙学模拟不同意Z> 4处的BHS是否在固定的Galaxy Stellar质量质量过度质量或与M_BH-M_STAR量表相对于M_BH-M_STAR量表质量过度质量或质量源。当使用每个模拟或经验关系产生的局部缩放关系时，我们的结论是不变的。我们发现，与明亮的类星体不同，模拟微弱的类星体种群的BH质量抵消了整个BH种群的BH质量偏移，用于所有模拟。因此，JWST观察到的具有L_BOL = 10^45-10^46 ERG/s的微弱类星体可以在高红移时提供BHS组装的关键约束。此外，这将有助于限制宇宙学模拟的高红移状态，包括BH播种，早期生长和与宿主星系的共同发展。我们的结果还激发了对较大的宇宙学量的模拟，降低到Z = 6，具有相同的子网格物理学多样性，以便在高红移时获得有关最极端物体的统计数据。
The James Webb Space Telescope will have the power to characterize high-redshift quasars at z>6 with an unprecedented depth and spatial resolution. While the brightest quasars at such redshift (i.e., with bolometric luminosity L_bol> 10^46 erg/s) provide us with key information on the most extreme objects in the Universe, measuring the black hole (BH) mass and Eddington ratios of fainter quasars with L_bol= 10^45-10^46 erg/s opens a path to understand the build-up of more normal BHs at z>6. In this paper, we show that the Illustris, TNG100, TNG300, Horizon-AGN, EAGLE, and SIMBA large-scale cosmological simulations do not agree on whether BHs at z>4 are overmassive or undermassive at fixed galaxy stellar mass with respect to the M_BH-M_star scaling relation at z=0 (BH mass offsets). Our conclusions are unchanged when using the local scaling relation produced by each simulation or empirical relations. We find that the BH mass offsets of the simulated faint quasar population at z>4, unlike those of bright quasars, represent the BH mass offsets of the entire BH population, for all the simulations. Thus, a population of faint quasars with L_bol= 10^45-10^46 erg/s observed by JWST can provide key constraints on the assembly of BHs at high redshift. Moreover, this will help constraining the high-redshift regime of cosmological simulations, including BH seeding, early growth, and co-evolution with the host galaxies. Our results also motivate the need for simulations of larger cosmological volumes down to z=6, with the same diversity of sub-grid physics, in order to gain statistics on the most extreme objects at high redshift.
