Anisotropic strange stars and its maximum mass in Finch-Skea geometry in dimensions D ≥ 4

• Published in: Physica scripta Vol. 98; no. 12; pp. 125004 - 125034
• Main Authors: Das, B, Goswami, K B, Saha, A, Chattopadhyay, P K
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.12.2023
• Subjects: anisotropy; bag constant; general relativity; higher dimensions; strange star
• ISSN: 0031-8949; 1402-4896
• DOI: 10.1088/1402-4896/ad06f6

Abstract In this article, we have demonstrated a stellar model for compact stars in the presence of strange matter embedded in D ≥ 4 dimensional space-time defined by the Finch-Skea metric. To study the relevant physical properties of the interior matter, we consider the equation of state ( henceforth EOS ) p = 1 3 ( ρ − 4 B ) as proposed in the MIT bag model, where B is termed the bag constant. The mass-radius relationship in four and higher dimensions is determined using the range of values of surface density through the relation ρ s = 4 B , for which bulk strange matter may be a viable issue for compact objects. Here, we choose the range of B so that stable strange matter may exist relative to a neutron at zero external pressure. We note that a maximum value of the stellar radius exists when B is fixed at a given allowed value for which metric functions considered to be real here. This is the maximum allowed radius ( b max ) in this model, which depends on the surface density of a strange star. In four dimensions, the compactness of a star is found to be greater than 0.33. In the case of higher dimensions ( D > 4), we observed different values of compactness. Causality conditions are satisfied interior to the star up to the maximum allowed radius ( b max ) , for which the metric function is real. The validity of the energy conditions, surface redshift and other parameters of the stellar configuration are studied, and new results are found. The stability of the model is also studied.