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Strange quark mass(ms)dependent model of anisotropic strange quark star

中国物理C:英文版 2023年第9期47卷 145-161页

作者： A.Hakim K.B.Goswami P.K.Chattopadhyay Department of Physics Coochbehar Panchanan BarmaUniversityVivekananda StreetDistrict:Coochbehar736101West BengalIndia

This article presents the configuration of strange quark stars in hydrostatic equilibrium considering the Vaidya-Tikekar metric *** interior of such stars comprises strange quark matter(henceforth SQM),whose equation of state(hencefor orth EoS)is described by the mit EoS p=1/3(p-4B),where B is the difference between perturbative and non-perturbative *** have included the mass of the strange quark into the EoS and studied its effect on the overall properties of the strange quark star in this *** is observed that the maximum mass reaches its highest value *** have evaluated the range of the maximum mass of the strange quark star by solving the TOV equation for 57.55model is found suitable for describing the mass of pulsars such as PSR J1614-2230 and Vela X-1 and the secondary objects in the GW170817 *** model is also useful in predicting the radius of the recently observed pulsars PSR J0030+0451,PSR J0740+6620,and PSR J0952-0607 and the secondary objects in the GW170817 and GW190814 *** model is found to be stable with respect to all stability criteria of the stellar configurations and is also stable with respect to small perturbations.

关键词： Einstein field equation strange star strange quark mass mit bag model

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Maximum mass of anisotropic charged strange quark stars in a higher dimensional approach(D≥4)

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Chinese Physics C 2023年第1期47卷 271-292页

作者： A.Saha K.B.Goswamiy B.Dasz P.K.Chattopadhyayx Department of Physics Alipurduar CollegeAlipurduarWest Bengal 736122India Department of Physics Coochbehar Panchanan Barma UniversityWest Bengal 736101India

In this article,a new class of solutions of Einstein-Maxwell field equations of relativistic strange quark stars obtained in dimensions D≥4,is *** assume that the geometry of space-time is pseudo-spheroid,embedded in Euclidean space of(D-1)*** mit bag model equation of state(henceforth EoS)is employed to study the relevant properties of strange quark *** the causal and non-negative nature of the square of the radial sound velocity(vr2),we observe that some restrictions exist on the reduced radius(b/R),where R is a parameter related to the curvature of the space-time,and b is the radius of the *** spheroidal parameter A used here defines the metric potential of the grrcomponent,which is pseudo-spheroidal in *** note that the pressure anisotropy and charge have some effects onλ.The maximum mass for a given surface density(ρs)or bag constant(B)assumes a maximum value in dimension D=5and decreases for other values of *** generalized Buchdahl limit for a higher dimensional charged star is also obeyed in this *** observe that in this model,we can predict the mass of a strange quark star using a suitable value of the electric charge(Q)and bag constant(B).Energy and stability conditions are also satisfied in this *** is also studied considering the dependence of the Lagrangian perturbation of radial pressure(Δpr)on the frequency of normal modes of *** tidal Love number and tidal de-formability are also evaluated.

关键词： strange star mit bag model Einstein-Maxwell equations higher Dimension

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