Zhang, Fu-Wen 2014 T90仅受宇宙学红移

主要内容:
把139个Swift暴都转换到140 / (1 + z ) keV 到350 / (1 + z ) keV之间，再看他们的T90，也就是把伽马暴都转换到共动系，发现T90几乎是常数；反过来说明伽马暴不随宇宙演化？

精彩摘抄:


文章信息:

· Find Similar Abstracts (with default settings below)

· Electronic Refereed Journal Article (HTML)

· Full Refereed Journal Article (PDF/Postscript)

· arXiv e-print (arXiv:1309.5612)

· References in the article

· SIMBAD Objects (12)

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		Cosmological Time Dilation in Durations of Swift Long Gamma-Ray Bursts
Authors:		Zhang, Fu-Wen; Fan, Yi-Zhong; Shao, Lang; Wei, Da-Ming
Affiliation:		AA(Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain ObservatoryChinese Academy of Sciences, Nanjing 210008, China ; College of ScienceGuilin University of Technology, Guilin 541004, China), AB(Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain ObservatoryChinese Academy of Sciences, Nanjing 210008, China), AC(Department of Space Science and AstronomyHebei Normal University, Shijiazhuang 050024, China), AD(Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain ObservatoryChinese Academy of Sciences, Nanjing 210008, China)
Publication:		The Astrophysical Journal Letters, Volume 778, Issue 1, article id. L11, 5 pp. (2013). (ApJL Homepage)
Publication Date:		11/2013
Origin:		IOP
Astronomy Keywords:		gamma-ray burst: general, methods: data analysis
DOI:		10.1088/2041-8205/778/1/L11
Bibliographic Code:		2013ApJ...778L..11Z

Abstract

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.

---

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)