The maximum limit of the density variation parameter ? for a stable neutron star

Parui, Ramen Kumar; Sarma, H. N. K.

doi:10.1007/bf00644621

Cited by 4 publications

(1 citation statement)

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“…Now for the fixed surface density of 2 × 10 14 gm/cc, Parui and Sarma [56] have deduced that minimum ra- dius density (the ratio of the surface density to the radius of the star) is minimum for the λ = 0.68. Based on this study, later Parui [57] has generalized that for both the charged and uncharged neutron star of densities having 10 15 and 10 16 gm/cc, λ max becomes 0.68 in each cases.…”

Section: Physical Analysismentioning

confidence: 99%

A study on the effect of anisotropy under Finch-Skea geometry

Das¹,

Chakraborty²,

Baskey³

et al. 2020

Preprint

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The popularity of the Finch-Skea ansatz [1] to describe relativistic stellar model have encouraged us to study the analytic solutions of the Einstein field equation. We have presented a class of exact solutions to the field equations after considering the corresponding two cases: (i) positive value of anisotropic parameter, and (ii) absence of any anisotropy. Smooth matching of the interior solutions with the Schwarzschild exterior solution helped us to determine constants. The physical features of the solutions thus obtained have been studied both graphically and numerically with the specific pulsar 4U 1608 − 52 (Mass = 1.57 +0.30 −0.29 M ⊙ and radius = 9.8 ± 1.8 km [2]). The stability conditions for the model have also been discussed, however the model is found to be stable for zero anisotropy.

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Section: Physical Analysismentioning

confidence: 99%