Relativistic anisotropic models for compact star with equation of state p = f(ρ)
| Autor: | S. K. Maurya, Mahmood K. Jasim, Baiju Dayanandan, Y. K. Gupta, Ahmed Al-Jamel |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
010308 nuclear & particles physics General relativity Equation of state (cosmology) Astronomy and Astrophysics Perfect fluid Radius Compact star 01 natural sciences Redshift Exact solutions in general relativity Space and Planetary Science Quantum mechanics 0103 physical sciences Anisotropy 010303 astronomy & astrophysics Mathematical Physics |
| Zdroj: | International Journal of Modern Physics D. 26:1750002 |
| ISSN: | 1793-6594 0218-2718 |
| Popis: | We present new anisotropic models for Buchdahl [H. A. Buchdahl, Phys. Rev. 116 (1959) 1027.] type perfect fluid solution. For this purpose, we started with metric potential [Formula: see text] same as Buchdahl [H. A. Buchdahl, Phys. Rev. 116 (1959) 1027.] and [Formula: see text] is monotonically increasing function as suggested by Lake [K. Lake, Phys. Rev. D 67 (2003) 104015]. After that we determine the new pressure anisotropy factor [Formula: see text] with the help of both the metric potentials [Formula: see text] and [Formula: see text] and propose new well behaved general solution for anisotropic fluid distribution. The physical quantities like energy density, radial and tangential pressures, velocity of sound and redshift etc. are positive and finite inside the compact star. In this connection, we have studied the stability of the models, which is most vital one and also we determined the equation of state [Formula: see text] for the realistic compact star models. It is noted that the mass and radius of our models can represent the structure of realistic astrophysical objects such as Her X-1 and RXJ 1856-37. |
| Databáze: | OpenAIRE |
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