GRB 090423: Marking the death of a massive star at z=8.2
Lin, L; Liang, EW; Zhang SN(张双南); Zhang, SN
刊名SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
2010
卷号53期号:1页码:#REF!
关键词gamma-ray bursts high energy phenomenon cosmology
学科分类Physics
DOI10.1007/s11433-010-0027-z
通讯作者Liang, EW (reprint author), Guangxi Univ, Dept Phys, Nanning 530004, Peoples R China.
文章类型Article
英文摘要GRB 090423 is the new high-z record holder of Gamma-ray bursts (GRBs) with z similar to 8.2. We present a detailed analysis of both the spectral and temporal features of GRB 090423 observed with Swift/BAT and Fermi/GBM. We find that the T 90 observed with BAT in the 15-150 keV band is 13.2 s, corresponding to similar to 1.4 s at z=8.2. It once again gives rise to the issue of whether the progenitors of high-z GRBs are massive stars or mergers since the discovery of GRB 080913 at z=6.7. In comparison with the T 90 distribution in the burst frame of the current redshift-known GRB sample, we find that it is marginally grouped into the long group (Type II GRBs). The spectrum observed with both BAT and GBM is well fitted by a power-law with exponential cutoff, which yields an E(p)=(50.4 +/- 7.0) keV. The event satisfies the Amati-relation well for Type II GRBs within their 3 sigma uncertainty range. Our results indicate that this event would be produced by the death of a massive star. Based on the Amati-relation, we derive its distance modulus, which follows the Hubble diagram of the concordance cosmology model at a redshift of similar to 8.2.
类目[WOS]Physics, Multidisciplinary
收录类别SCI
WOS记录号WOS:000280291800014
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225869
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
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Lin, L,Liang, EW,Zhang SN,et al. GRB 090423: Marking the death of a massive star at z=8.2[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2010,53(1):#REF!.
APA Lin, L,Liang, EW,张双南,&Zhang, SN.(2010).GRB 090423: Marking the death of a massive star at z=8.2.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,53(1),#REF!.
MLA Lin, L,et al."GRB 090423: Marking the death of a massive star at z=8.2".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 53.1(2010):#REF!.
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