Lemaître-Tolman-Bondi static universe in Rastall-like gravity
In this work, we try to obtain a stable Lemaître-Tolman-Bondi (LTB) static universe, which is spherically symmetric and radially inhomogeneous. However, this is not an easy task, and fails in general relativity (GR) and various modified gravity theories, because the corresponding LTB static universe...
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2020-11-01
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Series: | Nuclear Physics B |
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doaj-8c7c44ce141345a8a5c0881d045ef8b32020-11-25T03:39:25ZengElsevierNuclear Physics B0550-32132020-11-01960115179Lemaître-Tolman-Bondi static universe in Rastall-like gravityZhong-Xi Yu0Shou-Long Li1Hao Wei2School of Physics, Beijing Institute of Technology, Beijing 100081, ChinaDepartment of Physics and Synergetic Innovation Center for Quantum Effect and Applications, Hunan Normal University, Changsha 410081, ChinaSchool of Physics, Beijing Institute of Technology, Beijing 100081, China; Corresponding author.In this work, we try to obtain a stable Lemaître-Tolman-Bondi (LTB) static universe, which is spherically symmetric and radially inhomogeneous. However, this is not an easy task, and fails in general relativity (GR) and various modified gravity theories, because the corresponding LTB static universes must reduce to the Friedmann-Robertson-Walker (FRW) static universes. We find a way out in a new type of modified gravity theory, in which the conservation of energy and momentum is broken. In this work, we have proposed a novel modification to the original Rastall gravity. In some sense, our Rastall-like gravity is essentially different from GR and the original Rastall gravity. In this Rastall-like gravity, LTB static solutions have been found. The stability of LTB static universe against both the homogeneous and the inhomogeneous scalar perturbations is also discussed in details. We show that a LTB static universe can be stable in this Rastall-like gravity.http://www.sciencedirect.com/science/article/pii/S0550321320302650 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhong-Xi Yu Shou-Long Li Hao Wei |
spellingShingle |
Zhong-Xi Yu Shou-Long Li Hao Wei Lemaître-Tolman-Bondi static universe in Rastall-like gravity Nuclear Physics B |
author_facet |
Zhong-Xi Yu Shou-Long Li Hao Wei |
author_sort |
Zhong-Xi Yu |
title |
Lemaître-Tolman-Bondi static universe in Rastall-like gravity |
title_short |
Lemaître-Tolman-Bondi static universe in Rastall-like gravity |
title_full |
Lemaître-Tolman-Bondi static universe in Rastall-like gravity |
title_fullStr |
Lemaître-Tolman-Bondi static universe in Rastall-like gravity |
title_full_unstemmed |
Lemaître-Tolman-Bondi static universe in Rastall-like gravity |
title_sort |
lemaître-tolman-bondi static universe in rastall-like gravity |
publisher |
Elsevier |
series |
Nuclear Physics B |
issn |
0550-3213 |
publishDate |
2020-11-01 |
description |
In this work, we try to obtain a stable Lemaître-Tolman-Bondi (LTB) static universe, which is spherically symmetric and radially inhomogeneous. However, this is not an easy task, and fails in general relativity (GR) and various modified gravity theories, because the corresponding LTB static universes must reduce to the Friedmann-Robertson-Walker (FRW) static universes. We find a way out in a new type of modified gravity theory, in which the conservation of energy and momentum is broken. In this work, we have proposed a novel modification to the original Rastall gravity. In some sense, our Rastall-like gravity is essentially different from GR and the original Rastall gravity. In this Rastall-like gravity, LTB static solutions have been found. The stability of LTB static universe against both the homogeneous and the inhomogeneous scalar perturbations is also discussed in details. We show that a LTB static universe can be stable in this Rastall-like gravity. |
url |
http://www.sciencedirect.com/science/article/pii/S0550321320302650 |
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AT zhongxiyu lemaitretolmanbondistaticuniverseinrastalllikegravity AT shoulongli lemaitretolmanbondistaticuniverseinrastalllikegravity AT haowei lemaitretolmanbondistaticuniverseinrastalllikegravity |
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