论文标题
nihao-xxiii：黑洞反馈形状的暗物质密度
NIHAO-XXIII: Dark Matter density shaped by Black Hole feedback
论文作者
论文摘要
我们对恒星质量中八个以上数量级的暗物质分布与星系形成的反应进行系统分析。我们通过添加46个新的高分辨率模拟，其中包括黑洞反馈的巨大星系，扩展了Nihao-IV纸（Tollet等）中提出的先前工作。我们表明，由于大型光环中的大中央恒星成分，AGN产生的流出能够部分抵消暗物质收缩。净效果是放松中央暗物质分布，该分布移至halo质量的较小的cuspy密度分布，大于$ \ $ \ 3 \ times 10^{12} $ m $ _ {\ odot} $。围绕密度剖面坡度的平均值（$α$）的平均值是相当恒定的（$Δα\约0.3 $），除了带有光晕群体左右的星系$ 10^{12} $ m $ _ {\ odot} $，在从斯特尔到稳定的系统中，几乎增加了三分之二的散布的系统。我们为整个恒星质量范围内的深色密度概况的斜率提供了有用的拟合配方：$ 10^5-10^{12} $ M $ _ {\ odot} $（$ 2 \ times 10^9-5 \ 9-5 \ times 10^times 10^{13} {13} $ m $ m $ m $ _ _ \ _ {
We present a systematic analysis of the reaction of dark matter distribution to galaxy formation across more than eight orders of magnitude in stellar mass. We extend the previous work presented in the NIHAO-IV paper (Tollet et al.) by adding 46 new high resolution simulations of massive galaxies performed with the inclusion of Black Hole feedback. We show that outflows generated by the AGN are able to partially counteract the dark matter contraction due to the large central stellar component in massive haloes. The net effect is to relax the central dark matter distribution that moves to a less cuspy density profiles at halo masses larger than $\approx 3 \times 10^{12}$ M$_{\odot}$. The scatter around the mean value of the density profile slope ($α$) is fairly constant ($Δα\approx 0.3$), with the exception of galaxies with halo masses around $10^{12}$ M$_{\odot}$, at the transition from stellar to AGN feedback dominated systems, where the scatter increases by almost a factor three. We provide useful fitting formulas for the slope of the dark matter density profiles at few percent of the virial radius for the whole stellar mass range: $10^5-10^{12}$ M$_{\odot}$ ($2 \times 10^9-5 \times 10^{13}$ M$_{\odot}$ in halo mass).
