Study of gravastars under f(T) gravity
In the present paper, we propose a stellar model under the f(T) gravity following the conjecture of Mazur-Mottola [1,2] known in literature as gravastar, a viable alternative to the black hole. This gravastar has three different regions, viz., (A) Interior core region, (B) Intermediate thin shell, a...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-05-01
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| Series: | Nuclear Physics B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0550321320300729 |
| _version_ | 1819050166561275904 |
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| author | Amit Das Shounak Ghosh Debabrata Deb Farook Rahaman Saibal Ray |
| author_facet | Amit Das Shounak Ghosh Debabrata Deb Farook Rahaman Saibal Ray |
| author_sort | Amit Das |
| collection | DOAJ |
| description | In the present paper, we propose a stellar model under the f(T) gravity following the conjecture of Mazur-Mottola [1,2] known in literature as gravastar, a viable alternative to the black hole. This gravastar has three different regions, viz., (A) Interior core region, (B) Intermediate thin shell, and (C) Exterior spherical region. It is assumed that in the interior region the fluid pressure is equal to a negative matter-energy density providing a constant repulsive force over the spherical thin shell. This shell at the intermediate region is assumed to be formed by a fluid of ultrarelativistic plasma and the pressure, which is directly proportional to the matter-energy density according to Zel'dovich's conjecture of stiff fluid [Zel'dovich (1972) [3]], does nullify the repulsive force exerted by the interior core region for a stable configuration. On the other hand, the exterior spherical region can be described by the exterior Schwarzschild-de Sitter solution. With all these specifications we have found out a set of exact and singularity-free solutions of the gravastar which presents several physically interesting as well as valid features within the framework of alternative gravity. |
| first_indexed | 2024-12-21T11:43:44Z |
| format | Article |
| id | doaj.art-9106f9ac7b1545df904dbd3d99eceb0b |
| institution | Directory Open Access Journal |
| issn | 0550-3213 |
| language | English |
| last_indexed | 2024-12-21T11:43:44Z |
| publishDate | 2020-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Physics B |
| spelling | doaj.art-9106f9ac7b1545df904dbd3d99eceb0b2022-12-21T19:05:14ZengElsevierNuclear Physics B0550-32132020-05-01954Study of gravastars under f(T) gravityAmit Das0Shounak Ghosh1Debabrata Deb2Farook Rahaman3Saibal Ray4Department of Physics, Government College of Engineering and Ceramic Technology, Kolkata 700010, West Bengal, IndiaDepartment of Physics, Indian Institute of Engineering Science and Technology, B. Garden, Howrah 711103, West Bengal, IndiaDepartment of Physics, Indian Institute of Engineering Science and Technology, B. Garden, Howrah 711103, West Bengal, IndiaDepartment of Mathematics, Jadavpur University, Kolkata 700032, West Bengal, IndiaDepartment of Physics, Government College of Engineering and Ceramic Technology, Kolkata 700010, West Bengal, India; Corresponding author.In the present paper, we propose a stellar model under the f(T) gravity following the conjecture of Mazur-Mottola [1,2] known in literature as gravastar, a viable alternative to the black hole. This gravastar has three different regions, viz., (A) Interior core region, (B) Intermediate thin shell, and (C) Exterior spherical region. It is assumed that in the interior region the fluid pressure is equal to a negative matter-energy density providing a constant repulsive force over the spherical thin shell. This shell at the intermediate region is assumed to be formed by a fluid of ultrarelativistic plasma and the pressure, which is directly proportional to the matter-energy density according to Zel'dovich's conjecture of stiff fluid [Zel'dovich (1972) [3]], does nullify the repulsive force exerted by the interior core region for a stable configuration. On the other hand, the exterior spherical region can be described by the exterior Schwarzschild-de Sitter solution. With all these specifications we have found out a set of exact and singularity-free solutions of the gravastar which presents several physically interesting as well as valid features within the framework of alternative gravity.http://www.sciencedirect.com/science/article/pii/S0550321320300729 |
| spellingShingle | Amit Das Shounak Ghosh Debabrata Deb Farook Rahaman Saibal Ray Study of gravastars under f(T) gravity Nuclear Physics B |
| title | Study of gravastars under f(T) gravity |
| title_full | Study of gravastars under f(T) gravity |
| title_fullStr | Study of gravastars under f(T) gravity |
| title_full_unstemmed | Study of gravastars under f(T) gravity |
| title_short | Study of gravastars under f(T) gravity |
| title_sort | study of gravastars under f t gravity |
| url | http://www.sciencedirect.com/science/article/pii/S0550321320300729 |
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