Upper bound on the radii of regular ultra-compact star photonspheres
We investigate the photonsphere in the background of regular asymptotically flat compact stars. The analysis includes the general hairy compact star considering the matter fields' backreaction on the metric in various gravity theories. We prove that the photonsphere of the compact star has an u...
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Elsevier
2019-03-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269319300747 |
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doaj-3c83b29180334786adeee754ef30ee482020-11-25T03:21:45ZengElsevierPhysics Letters B0370-26932019-03-01790396399Upper bound on the radii of regular ultra-compact star photonspheresYan Peng0School of Mathematical Sciences, Qufu Normal University, Qufu, Shandong 273165, ChinaWe investigate the photonsphere in the background of regular asymptotically flat compact stars. The analysis includes the general hairy compact star considering the matter fields' backreaction on the metric in various gravity theories. We prove that the photonsphere of the compact star has an upper bound expressed in terms of the ADM mass of the spacetime. In the case of negative isotropic trace, a stronger upper bound can be obtained.http://www.sciencedirect.com/science/article/pii/S0370269319300747 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Yan Peng |
| spellingShingle |
Yan Peng Upper bound on the radii of regular ultra-compact star photonspheres Physics Letters B |
| author_facet |
Yan Peng |
| author_sort |
Yan Peng |
| title |
Upper bound on the radii of regular ultra-compact star photonspheres |
| title_short |
Upper bound on the radii of regular ultra-compact star photonspheres |
| title_full |
Upper bound on the radii of regular ultra-compact star photonspheres |
| title_fullStr |
Upper bound on the radii of regular ultra-compact star photonspheres |
| title_full_unstemmed |
Upper bound on the radii of regular ultra-compact star photonspheres |
| title_sort |
upper bound on the radii of regular ultra-compact star photonspheres |
| publisher |
Elsevier |
| series |
Physics Letters B |
| issn |
0370-2693 |
| publishDate |
2019-03-01 |
| description |
We investigate the photonsphere in the background of regular asymptotically flat compact stars. The analysis includes the general hairy compact star considering the matter fields' backreaction on the metric in various gravity theories. We prove that the photonsphere of the compact star has an upper bound expressed in terms of the ADM mass of the spacetime. In the case of negative isotropic trace, a stronger upper bound can be obtained. |
| url |
http://www.sciencedirect.com/science/article/pii/S0370269319300747 |
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AT yanpeng upperboundontheradiiofregularultracompactstarphotonspheres |
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