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Constraining Omega(M) and dark energy with gamma-ray bursts
Dai, ZG1; Liang EW(梁恩维)1,2,3; Xu, D1; Dai, ZG (reprint author), Nanjing Univ, Dept Astron, 22 Hankou Lu, Nanjing 210093, Jiangsu, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2004-09-10
卷号612期号:2页码:L101-L104
DOI10.1086/424694
产权排序第3完成单位
收录类别SCI
关键词Cosmological Parameters Cosmology : Observations Gamma Rays : Bursts
摘要An E-gamma,E-jet proportional to E-p'(1.5) relationship with a small scatter for current gamma-ray burst (GRB) data was recently reported, where E-gamma,E-jet is the beaming-corrected gamma-ray energy and E'(p) is the nuF(nu) peak energy in the local observer frame. By considering this relationship for a sample of 12 GRBs with known redshift, peak energy, and break time of afterglow light curves, we constrain the mass density of the universe and the nature of dark energy. We find that the mass density Omega(M) = 0.35(-0.15)(+0.15) (at the 1 sigma confidence level) for a flat universe with a cosmological constant, and the w parameter of an assumed static dark energy equation of state w = -0.84(-0.83)(+0.57) ( 1 sigma). Our results are consistent with those from Type Ia supernovae. A larger sample established by the upcoming Swift satellite is expected to provide further constraints.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000223791200004
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]PROBE WMAP OBSERVATIONS ; COSMOLOGICAL CONSTANT ; OPTICAL AFTERGLOW ; REDSHIFT ; ENERGETICS ; SUPERNOVA ; DISCOVERY ; JET ; SPECTRUM ; UNIVERSE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6970
专题星系研究组
通讯作者Dai, ZG (reprint author), Nanjing Univ, Dept Astron, 22 Hankou Lu, Nanjing 210093, Jiangsu, Peoples R China.
作者单位1.Department of Astronomy, Nanjing University, 22 Hankou Lu, Nanjing, Jiangsu 210093, China
2.Department of Physics, Guangxi University, Nanning 530004, China
3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650011, China
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Dai, ZG,Liang EW,Xu, D,et al. Constraining Omega(M) and dark energy with gamma-ray bursts[J]. ASTROPHYSICAL JOURNAL,2004,612(2):L101-L104.
APA Dai, ZG,Liang EW,Xu, D,&Dai, ZG .(2004).Constraining Omega(M) and dark energy with gamma-ray bursts.ASTROPHYSICAL JOURNAL,612(2),L101-L104.
MLA Dai, ZG,et al."Constraining Omega(M) and dark energy with gamma-ray bursts".ASTROPHYSICAL JOURNAL 612.2(2004):L101-L104.
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