Anisotropic strange quark star in Finch-Skea geometry and its maximum mass for non-zero strange quark mass (ms ≠ 0)*BD and KBG thank the CSIR for providing the fellowship vide No 09/1219(0005)/2019-EMR-I and 09/1219(0004)/2019-EMR-I, respectively. (1st May 2023)

• Record Type: Journal Article
• Authors: Das, B.; Goswami, K. B.; Saha, A.; Chattopadhyay, P. K.
• Is Part Of: Chinese physics C. Volume 47:Number 5(2023)
• Publication Date: 2023-05-01
• Subjects: compact star -- strange star -- anisotropy -- MIT EoS -- strange quark mass; Particles (Nuclear physics) -- Periodicals; Nuclear physics -- Periodicals; 539.76
• DOI: 10.1088/1674-1137/acb90f
• Languages: English
• ISSNs: 1674-1137

Abstract

Abstract: A class of relativistic astrophysical compact objects is analyzed in the modified Finch-Skea geometry described by the MIT bag model equation of state of interior matter, , where B is known as the bag constant. B plays an important role in determining the physical features and structure of strange stars. We consider the finite mass of the strange quark ( ) and study its effects on the stability of quark matter inside a star. We note that the inclusion of strange quark mass affects the gross properties of the stellar configuration, such as maximum mass, surface red-shift, and the radius of strange quark stars. To apply our model physically, we consider three compact objects, namely, (i) VELA X-1, (ii) 4U 1820-30, and (iii) PSR J 1903+327, which are thought to be strange stars. The range of B is restricted from 57.55 to ( ), for which strange matter might be stable relative to iron ( ). However, we also observe that metastable and unstable strange matter depend on B and . All energy conditions hold well in this approach. Stability in terms of the Lagrangian perturbation of radial pressure is studied in this paper.