Massive compact Bardeen stars with conformal motion
The main focus of this paper is to discuss the solutions of Einstein-Maxwell's field equations for compact stars study. We have chosen the MIT Bag model equation of state for the pressure-energy density relationship and conformal Killing vectors are used to investigate the appropriate forms for...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-12-01
|
| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320307309 |
| _version_ | 1830301052853813248 |
|---|---|
| author | M. Farasat Shamir |
| author_facet | M. Farasat Shamir |
| author_sort | M. Farasat Shamir |
| collection | DOAJ |
| description | The main focus of this paper is to discuss the solutions of Einstein-Maxwell's field equations for compact stars study. We have chosen the MIT Bag model equation of state for the pressure-energy density relationship and conformal Killing vectors are used to investigate the appropriate forms for metric coefficients. We impose the boundary conditions, by choosing the Bardeen model to describe as an exterior spacetime. The Bardeen model may provide the analysis with some interesting results. For example, the extra terms involved in the asymptotic representations as compared to the usual Reissner-Nordstrom case may influence the mass of a stellar structure. Both energy density and pressure profiles behave realistically except a central singularity. It is shown that the energy conditions are satisfied in our study. The equilibrium conditions through TOV equation and stability criteria through Adiabatic index for the charged stellar structure study are investigated. We have also provided a little review of the case with Reissner-Nordstrom spacetime as an exterior geometry for the matching condition. In both cases, the masses obey the Andreasson's limit M≤R/3+R/9+q2/3R requirement for a charged star. Conclusively, the results show that Bardeen model geometry provides more massive stellar objects as compared to usual Reissner-Nordstrom spacetime. In particular, the current study supports the existence of realistic massive structures like PSR J 1614−2230. |
| first_indexed | 2024-12-19T08:40:19Z |
| format | Article |
| id | doaj.art-abafa10f167a408092186f3e7fc0d9bb |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-19T08:40:19Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-abafa10f167a408092186f3e7fc0d9bb2022-12-21T20:28:57ZengElsevierPhysics Letters B0370-26932020-12-01811135927Massive compact Bardeen stars with conformal motionM. Farasat Shamir0National University of Computer and Emerging Sciences, Islamabad, Lahore Campus, PakistanThe main focus of this paper is to discuss the solutions of Einstein-Maxwell's field equations for compact stars study. We have chosen the MIT Bag model equation of state for the pressure-energy density relationship and conformal Killing vectors are used to investigate the appropriate forms for metric coefficients. We impose the boundary conditions, by choosing the Bardeen model to describe as an exterior spacetime. The Bardeen model may provide the analysis with some interesting results. For example, the extra terms involved in the asymptotic representations as compared to the usual Reissner-Nordstrom case may influence the mass of a stellar structure. Both energy density and pressure profiles behave realistically except a central singularity. It is shown that the energy conditions are satisfied in our study. The equilibrium conditions through TOV equation and stability criteria through Adiabatic index for the charged stellar structure study are investigated. We have also provided a little review of the case with Reissner-Nordstrom spacetime as an exterior geometry for the matching condition. In both cases, the masses obey the Andreasson's limit M≤R/3+R/9+q2/3R requirement for a charged star. Conclusively, the results show that Bardeen model geometry provides more massive stellar objects as compared to usual Reissner-Nordstrom spacetime. In particular, the current study supports the existence of realistic massive structures like PSR J 1614−2230.http://www.sciencedirect.com/science/article/pii/S0370269320307309Bardeen modelCompact starsConformal motion |
| spellingShingle | M. Farasat Shamir Massive compact Bardeen stars with conformal motion Physics Letters B Bardeen model Compact stars Conformal motion |
| title | Massive compact Bardeen stars with conformal motion |
| title_full | Massive compact Bardeen stars with conformal motion |
| title_fullStr | Massive compact Bardeen stars with conformal motion |
| title_full_unstemmed | Massive compact Bardeen stars with conformal motion |
| title_short | Massive compact Bardeen stars with conformal motion |
| title_sort | massive compact bardeen stars with conformal motion |
| topic | Bardeen model Compact stars Conformal motion |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320307309 |
| work_keys_str_mv | AT mfarasatshamir massivecompactbardeenstarswithconformalmotion |