Cosmological coupling of local gravitational systems

被引：2

作者：

Cadoni, Mariano ^{[1
,2
]}

Pitzalis, Mirko ^{[1
,2
]}

Rodrigues, Davi C. ^{[2
,3
]}

Sanna, Andrea P. ^{[1
]}

机构：

[1] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, Italy

[2] INFN, Sez Cagliari, I-09042 Monserrato, Italy

[3] Univ Fed Espirito Santo, Dept Fis & Nucleo Cosmo Ufes, BR-29075910 Vitoria, ES, Brazil

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2024年 / 08期

关键词：

Exact solutions; black holes and black hole thermodynamics in GR and beyond; galaxy dynamics; gravity; BLACK-HOLE MASS; NEWTONIAN DYNAMICS; EXPANSION; GALAXIES; PARTICLE;

D O I：

10.1088/1475-7516/2024/08/045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the cosmological coupling of spherical, local astrophysical systems. We derive a general formula quantifying the cosmological coupling of the Misner-Sharp mass of these objects. We show that, in the weak-field limit, the cosmological coupling is only allowed if there are pressure anisotropies. We also apply our results to galaxies, modelling them with the Navarro-Frenk-White and Einasto profiles. We show that the galactic mass can be coupled to the cosmological dynamics and examine its dependence on the scale factor of the universe.

引用

页数：31

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