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.
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页数：31
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