Impact of a variable cosmological constant on stellar matter configurations in Finch-Skea spacetime

• Published in: Astrophysics and space science Vol. 370; no. 5; p. 46
• Main Authors: Ilyas, M., Maha, Nawaz, Salma, Sher, Falak, Khan, Fawad
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.05.2025; Springer Nature B.V
• Subjects: Astrobiology; Astronomy; Astrophysics and Astroparticles; Cosmological constant; Cosmology; Geometry; Gravity; Observations and Techniques; Physics; Physics and Astronomy; Relativity; Space Exploration and Astronautics; Space Sciences (including Extraterrestrial Physics; Spacetime; Stars & galaxies; Stellar structure; Theory of relativity; Universe; Alternate to G.R; Compact stars; Modified theory of gravity; Variable cosmological constant
• ISSN: 0004-640X; 1572-946X
• DOI: 10.1007/s10509-025-04435-6

In this study, a variable cosmological constant model is created for anisotropic star structures, which satisfies the remaining physical requirements, and validates the required energy conditions (Ecs), and TOV equations. First, the Finch-Skea spacetime solution is taken into account as a static spherically symmetric metric. Moreover, external Schwarzschild geometry is taken into account to correlate our internal stellar structure and determine the values of the constants used in the Finch-Skea spacetime solution. Finally, in this paper, multiple aspects are discussed, such as the radius, compactness, stresses, stability, density profile, and masses under the variable cosmological constant model in f ( R , T ) gravity for various stars.