Evolution of expansion-free massive stellar object in f(R, T) gravity

This paper explores an expansion-free model of a cluster of stars in the f ( R , T ) gravity. We consider a dissipative anisotropic viscous model of the star cluster. The mathematical modeling of a cluster of stars involving field equations, junction condition and dynamical equations is presented....

Celý popis

Uložené v:

Podrobná bibliografia
Vydané v:	European physical journal plus Ročník 138; číslo 2; s. 134
Hlavní autori:	Manzoor, Rubab, Ramzan, Kashif, Farooq, M. Asim
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Berlin/Heidelberg Springer Berlin Heidelberg 08.02.2023 Springer Nature B.V
Predmet:	Anisotropy Applied and Technical Physics Astrophysics Atomic Complex Systems Condensed Matter Physics Cosmology Dark energy Dark matter Dissipation Evolution Geometry Gravity Mathematical and Computational Physics Mathematical models Molecular Optical and Plasma Physics Physics Physics and Astronomy Regular Article Shear Star clusters Stars Stars & galaxies Theoretical Theory of relativity Universe Velocity Viscosity
ISSN:	2190-5444, 2190-5444
On-line prístup:	Získať plný text
Tagy:	Pridať tag Žiadne tagy, Buďte prvý, kto otaguje tento záznam!

Popis
Shrnutí:	This paper explores an expansion-free model of a cluster of stars in the f ( R , T ) gravity. We consider a dissipative anisotropic viscous model of the star cluster. The mathematical modeling of a cluster of stars involving field equations, junction condition and dynamical equations is presented. The circumferential and relative radial velocities of the evolving layers of fluids are used to describe the physical meaning of expansion and shear effects. It is concluded that the expansion-free evolution of the star cluster contains a vacuum cavity within it. The relative velocity between the neighboring layers of fluids determines the cluster’s expansion-free and shear-free collapse. The Skripkin model with constant density is equivalent to the non-dissipative expansion-free isotropic star cluster. For the shear-free scenario, this model demonstrates homologous evolution. Finally, it is found that the f ( R , T ) gravitational terms indicating dark matter’s contribution to a star cluster have a significant impact on the dynamics of expansion-free evolution.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14
ISSN:	2190-5444 2190-5444
DOI:	10.1140/epjp/s13360-023-03734-7