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Compact Stellar Model with Two Different Equations of State
American Journal of Electromagnetics and Applications
Volume 8, Issue 1, June 2020, Pages: 12-17
Received: Jun. 5, 2019; Accepted: Aug. 15, 2019; Published: Feb. 25, 2020
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Authors
Daddy Balondo Iyela, Department of Physics, Faculty of Science, University of Kinshasa, Kinshasa, Democratic Republic of Congo
Nestor Anzola Kibamba, Department of Mathematics and Computer Science, Faculty of Science, University of Kinshasa, Kinshasa, Democratic Republic of Congo
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Abstract
We have modelled a neutral non-homogeneous anisotropic stellar compact object with two distinct equations of state in general relativity framework. We have considered the macroscopic features of a general relativistic gravitating compact object. The equation of state is quadratic in the core and linear in the envelope. There is smooth matching between the core, envelope and the vacuum exterior regions. We found the masses, radii and compactness of some compact objects such PSR J1614-2230, PSR J1903+0327, Vela X-1, SMC-X-1, Cen X-3; which are in agreement with previous investigations. The gravitational potentials and the matter variables are well behaved throughout the stellar structure. We present in particular the variation of the radius in the core and the envelope of the star by changing some parameters values. Physical features of the pulsars PSR J1614-2230 are presented in more details. It observed that the radial pressure in the core is higher than the radial pressure in the envelope. The investigation reveals that the model is physically relevant for the study of observed compact stars.
Keywords
General Relativity, Compact Star, Equation of State
To cite this article
Daddy Balondo Iyela, Nestor Anzola Kibamba, Compact Stellar Model with Two Different Equations of State, American Journal of Electromagnetics and Applications. Vol. 8, No. 1, 2020, pp. 12-17. doi: 10.11648/j.ajea.20200801.12
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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