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题名: COSMOLOGICAL TIME DILATION IN DURATIONS OF SWIFT LONG GAMMA-RAY BURSTS
作者: Zhang, Fu-Wen1, 2; Fan YiZhong(范一中)1; Shao, Lang3; Wei DaMing(韦大明)1
刊名: ASTROPHYSICAL JOURNAL LETTERS
出版日期: 2013-11-20
卷号: 778, 期号:1
关键词: gamma-ray burst: general ; methods: data analysis
DOI: 10.1088/2041-8205/778/1/L11
文章类型: Article
英文摘要: Cosmological time dilation is a fundamental phenomenon in an expanding universe, which stresses that both the duration and wavelength of the emitted light from a distant object at the redshift z will be dilated by a factor of 1 + z at the observer. By using a sample of 139 Swift long gamma-ray bursts with known redshift (z <= 8.2), we measure the observed duration (T-90) in the observed energy range between 140/(1 + z) keV and 350/(1 + z) keV, corresponding to a fixed energy range of 140-350 keV in the rest frame. We obtain a significant correlation between the duration and the factor 1 + z, i.e., T-90 = 10.5(1 + z) (0.94 +/- 0.26), which is consistent with that expected from the cosmological time dilation effect.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: LIGHT CURVES ; COMPLETE SAMPLE ; ENERGY ; CLASSIFICATION ; GRBS ; LAG ; SIGNATURE ; EVOLUTION
收录类别: SCI
语种: 英语
WOS记录号: WOS:000327116700011
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15514
Appears in Collections:暗物质和空间天文实验室_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.Guilin Univ Technol, Coll Sci, Guilin 541004, Peoples R China
3.Hebei Normal Univ, Dept Space Sci & Astron, Shijiazhuang 050024, Peoples R China
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