Journal
MODERN PHYSICS LETTERS A
Volume 26, Issue 8, Pages 575-587Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217732311034943
Keywords
Bag constant; compact stars; anisotropy parameter
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Funding
- UGC New Delhi [36-365/2008 (SR)]
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We study a compact star comprising strange matter content in the presence of pressure anisotropy. Considering strange matter with equation of state p = (rho-4B)/3, where B is Bag parameter, we analyze the effect of pressure anisotropy on the Bag parameter for a compact star described by Vaidya-Tikekar metric. The values of B inside and on surface of the star are determined for different anisotropy parameter alpha. It is found that in the vicinity of the center of a compact star, B parameter is almost constant. However, away from the center B varies with the radial distance and finally at the surface B attains a value independent of the anisotropy. It is also noted that for some values of alpha, B remains constant throughout the star. Given alpha and spheriodicity a, B is found to be decreasing with the increase in compactness factor. The models admitting B increasing with a for a given spheriodicity parameter (a) and compactness are also found.
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