Entropy of the Universe and Hierarchical Dark Matter

GW241011和GW241110：来自合并熵指数的分层并合线索

GW241011 and GW241110: Hints of Hierarchical Mergers from the Merger Entropy Index

本文通过合并熵指数研究GW241011和GW241110的分层并合起源，发现前者与密集恒星团中的分层并合一致，后者因不确定性大而存在争议。

重子塔利-费舍尔关系：层级宇宙中牛顿引力作用的结果

The Baryonic Tully-Fisher Relationship: A consequence of Newtonian Gravitation acting in a hierarchical Universe

本研究基于本地IGM物质呈层级分布的观测推论，通过理想化模型证明，在准分形层级宇宙中，牛顿引力稳定条件可自然导出重子塔利-费舍尔关系，为该天文标度律提供了新的理论解释视角。

Everything Everywhere All At Once: A Hierarchical Framework for Mapping Anisotropies in the Local Universe

We present a Bayesian hierarchical forward model for mapping the local luminosity-density field from heterogeneous redshift surveys. By dividing the survey volume into angular cells and redshift shells, we model the observed galaxy distribution directly in apparent-magnitude and redshift space. This allows us to infer cell-level luminosity functions and densities while preserving each survey's unique selection function. Simultaneously, the ensemble of cells constrains the cosmic-mean luminosity function, its redshift evolution, and the hyperparameters describing cell-to-cell variation. We appl…

Anti-hierarchical evolution of the Active Galactic Nucleus space density in a hierarchical universe

Recent observations show that the space density of luminous active galactic nuclei (AGNs) peaks at higher redshifts than that of faint AGNs. This downsizing trend in the AGN evolution seems to be contradictory to the hierarchical structure formation scenario. In this study, we present the AGN space density evolution predicted by a semi-analytic model of galaxy and AGN formation based on the hierarchical structure formation scenario. We demonstrate that our model can reproduce the downsizing trend of the AGN space density evolution. The reason for the downsizing trend in our model is a combinat…

晕黑洞的个数和熵

Number and Entropy of Halo Black Holes

基于微透镜和磁盘稳定性的限制，无论有没有限制，从广泛的二进制调查，我们估计的总数和熵的中间质量黑洞。假设可见宇宙由质量为$\sim 10^{12} M_{\odot}$的$10^{11}$晕组成，平均质量为$\sim 10^7 M_{\odot}$的典型核心黑洞将宇宙的无量纲熵（$S/k$）设定为1000戈戈尔。所有暗物质都被认定为黑洞，这将使宇宙的无量纲熵达到1000万googols，这意味着暗物质可以贡献超过99%的熵，这有利于所有暗物质都成为$ \sim 10^{5} M_{\odot}$质量体系中的黑洞。