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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.
Source PublicationASTROPHYSICAL JOURNAL
2004-09-10
Volume612Issue:2Pages:L101-L104
DOI10.1086/424694
Contribution Rank第3完成单位
Indexed BySCI
KeywordCosmological Parameters Cosmology : Observations Gamma Rays : Bursts
AbstractAn 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.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
WOS IDWOS:000223791200004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPROBE WMAP OBSERVATIONS ; COSMOLOGICAL CONSTANT ; OPTICAL AFTERGLOW ; REDSHIFT ; ENERGETICS ; SUPERNOVA ; DISCOVERY ; JET ; SPECTRUM ; UNIVERSE
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6970
Collection星系研究组
Corresponding AuthorDai, ZG (reprint author), Nanjing Univ, Dept Astron, 22 Hankou Lu, Nanjing 210093, Jiangsu, Peoples R China.
Affiliation1.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
Recommended Citation
GB/T 7714
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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