论文标题
使用Newhorizon模拟的矮星系中中间质量黑洞的种群统计
Population statistics of intermediate mass black holes in dwarf galaxies using the NewHorizon simulation
论文作者
论文摘要
虽然可以很好地确定超级质量黑洞（SMBHS）与他们的宿主星系共同进化，但目前尚不清楚较低的质量黑洞，所谓的中间质量黑洞（IMBHS）如何在其矮人银河系中进化。在本文中，我们介绍了来自Newhorizon模拟的大量IMBH样本的演变。我们表明，矮星系中IMBH的占用分数至少为50％，恒星质量降低至1E6 MSUN，但矮星系中BH的生长非常有限。在Newhorizon中，IMBH的增长在高红移Z = 3下的效率更高，但总的来说，IMBH直到其宿主星系离开矮人状态之前才显着增长。结果，Newhorizon低估的人观察到AGN光度函数和AGN分数。我们表明，IMBH保持在宿主星系的中心附着的困难在限制其质量增长方面起着重要作用，并且在较低的红移时，这种远离银河系中心的动态进化变得更加强大。
While it is well established that supermassive black holes (SMBHs) co-evolve with their host galaxy, it is currently less clear how lower mass black holes, so-called intermediate mass black holes (IMBHs), evolve within their dwarf galaxy hosts. In this paper, we present results on the evolution of a large sample of IMBHs from the NewHorizon simulation. We show that occupation fractions of IMBHs in dwarf galaxies are at least 50 percent for galaxies with stellar masses down to 1E6 Msun, but BH growth is very limited in dwarf galaxies. In NewHorizon, IMBH growth is somewhat more efficient at high redshift z = 3 but in general IMBH do not grow significantly until their host galaxy leaves the dwarf regime. As a result, NewHorizon under-predicts observed AGN luminosity function and AGN fractions. We show that the difficulties of IMBH to remain attached to the centres of their host galaxies plays an important role in limiting their mass growth, and that this dynamic evolution away from galactic centres becomes stronger at lower redshift.
