论文标题
光环质量和浓度的宇宙学依赖性在流体动力模拟中
Cosmology dependency of halo masses and concentrations in hydrodynamic simulations
论文作者
论文摘要
我们采用了一组磁性宇宙学流体动力学模拟，这些模拟跨越了$ 15 $不同的宇宙学，并提取了所有解决良好的光环的质量和浓度，$ z = 0-1 $，对于关键的过度固定，$δ_\ texttt {vir} {vir}，δ__{200c} $Δ_{200m}.$ We provide the first mass-concentration (Mc) relation and sparsity relation (i.e. $M_{\Delta1} - M_{\Delta2}$ mass conversion) of hydrodynamic simulations that is modelled by mass, redshift and cosmological parameters $Ω_m, Ω_b, σ_8, h_0$ as a tool for观察性研究。我们还量化了MC关系散射和NFW密度曲线对稀疏关系不确定性的影响。我们发现，在MC关系的帮助下转换质量会带来额外的分数散射（$ \ \％\％$），起源于与假定的NFW密度曲线的偏差。因此，我们提供了直接的质量质量转换关系拟合，取决于红移和宇宙学参数。我们发布了包装Hydro \ _MC，这是一种在本文中执行各种转换的Python工具。
We employ a set of Magneticum cosmological hydrodynamic simulations that span over $15$ different cosmologies, and extract masses and concentrations of all well-resolved haloes between $z=0-1$ for critical over-densities $Δ_\texttt{vir}, Δ_{200c}, Δ_{500c}, Δ_{2500c}$ and mean overdensity $Δ_{200m}.$ We provide the first mass-concentration (Mc) relation and sparsity relation (i.e. $M_{\Delta1} - M_{\Delta2}$ mass conversion) of hydrodynamic simulations that is modelled by mass, redshift and cosmological parameters $Ω_m, Ω_b, σ_8, h_0$ as a tool for observational studies. We also quantify the impact that the Mc relation scatter and the assumption of NFW density profiles have on the uncertainty of the sparsity relation. We find that converting masses with the aid of a Mc relation carries an additional fractional scatter ($\approx 4\%$) originated from deviations from the assumed NFW density profile. For this reason we provide a direct mass-mass conversion relation fit that depends on redshift and cosmological parameters. We release the package hydro\_mc, a python tool that perform all kind of conversions presented in this paper.
