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题名: Anisotropic cosmology with vector field in the Noether approach
作者: Zhang Sun(张笋)1, 2; Dong, Yi-Qiao3
刊名: ASTROPHYSICS AND SPACE SCIENCE
出版日期: 2015-09-01
卷号: 359, 期号:1, 页码:16
关键词: Cosmological vector field ; Anisotropy ; Bianchi cosmology ; Noether symmetry
学科分类: 天文和天体物理
DOI: 10.1007/s10509-015-2468-3
文章类型: Article
英文摘要: In this Letter, based on Bianchi-I type cosmological model, we have studied the evolution of universe in terms of a vector field coupled to the scalar field. The symmetries of the system are calculated in the Noether approach, the scalar potential and the gauge kinetic function are also obtained following these symmetries. The dynamical equations are integrated numerically and the behaviors of cosmological evolution are presented certainly. Furthermore, the early-time and late-time scenarios are also reached asymptotically, that is, the universe is during the period of decelerating expansion in the early time while during the period of accelerating expansion in the late time. Moreover, we have also studied the expansion isotropization of the universe during evolution. There is no Kasner solution in the present case, while the universe would approach an isotropic Robertson-Walker one, concretely, a de Sitter type one in the late time.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: MODELS ; SYMMETRIES ; INFLATION
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000360840500016
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14924
Appears in Collections:宇宙伽马暴、中子星及相关物理研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.PMO NJU, Joint Ctr Particle Nucl Phys & Cosmol J CPNPC, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
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