论文标题
物质聚类对规模和环境的依赖性
Simultaneous Dependence of Matter Clustering on Scale and Environment
论文作者
论文摘要
在这项工作中，我们提出了能够表征暗物质和气体聚类对规模和密度环境的同时依赖性的新统计工具，而这些都是与环境有关的小波功率谱（ENV-WPS），与环境相关的偏置函数（ENK-bias）以及依赖环境依赖于环境依赖的波浪交叉相互误差功能（env-Wcc）。这些统计数据应用于\ texttt {tng100-1}的暗物质和重型气体密度磁场，$ z = 3.0 $ - $ 0.0 $，以及\ texttt {Illriveris-1}和\ textttt {simba}，在$ z = 0 $。 ENV-WPS的测量表明，暗物质和气体的簇强度随密度的增加而增加，而高斯磁场的聚类强度则没有密度依赖性。通过测量ENV-bias和Env-WCC，我们发现它们随环境，规模和红移而差异很大。一个值得注意的功能是，在$ z = 0.0 $的情况下，由于$δ\ gtrsim 10 $ 10 $左右$ 3 \ h \ h \ mathrm {mpc}^{ - 1} $的偏置较小，这是由于较低的反馈强度下降的Agn反馈强度引起的气体复制。我们还发现，与在所有时期其他环境中，气体在最密集和密集的环境中都与暗物质更紧密相关。即使在$ z = 0 $时，env-wcc也大于$δ\ gtrsim 200 $和$δ\ lisesim 0.1 $ 0.1 $的$ 0.9 $，$ k \ salimsim 10 \ h \ h \ mathrm {mpc}^{ - 1} $。总而言之，我们的结果支持局部密度环境，对暗物质和气体分布之间的偏差不可忽略不可忽略。
In this work, we propose new statistical tools that are capable of characterizing the simultaneous dependence of dark matter and gas clustering on the scale and the density environment, and these are the environment-dependent wavelet power spectrum (env-WPS), the environment-dependent bias function (env-bias), and the environment-dependent wavelet cross-correlation function (env-WCC). These statistics are applied to the dark matter and baryonic gas density fields of the \texttt{TNG100-1} simulation at redshifts of $z=3.0$-$0.0$, and to \texttt{Illustris-1} and \texttt{SIMBA} at $z=0$. The measurements of the env-WPSs suggest that the clustering strengths of both the dark matter and the gas increase with increasing density, while that of a Gaussian field shows no density dependence. By measuring the env-bias and env-WCC, we find that they vary significantly with the environment, scale, and redshift. A noteworthy feature is that at $z=0.0$, the gas is less biased in denser environments of $Δ\gtrsim 10$ around $3 \ h\mathrm{Mpc}^{-1}$, due to the gas reaccretion caused by the decreased AGN feedback strength at lower redshifts. We also find that the gas correlates more tightly with the dark matter in both the most dense and underdense environments than in other environments at all epochs. Even at $z=0$, the env-WCC is greater than $0.9$ in $Δ\gtrsim 200$ and $Δ\lesssim 0.1$ at scales of $k \lesssim 10 \ h\mathrm{Mpc}^{-1}$. In summary, our results support the local density environment having a non-negligible impact on the deviations between dark matter and gas distributions up to large scales.
