| 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.
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2004-09-10 | |
| 卷号 | 612期号:2页码:L101-L104 |
| DOI | 10.1086/424694 |
| 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 |
| ISSN | 0004-637X |
| 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 |
| 引用统计 | |
| 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 |
| 推荐引用方式 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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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Constraining ΩM and （95KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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