Overcoming the circular problem for gamma-ray bursts in cosmological global-fitting analysis
Li, H; Xia JQ(夏俊卿); Liu J(刘杰); Zhang XM(张新民); Xia, JQ; Liu, J; Zhao, GB; Fan, ZH; Zhang, XM
刊名ASTROPHYSICAL JOURNAL
2008
卷号680期号:1页码:#REF!
关键词cosmological parameters cosmology : observations gamma rays : bursts
学科分类Astronomy & Astrophysics
DOI10.1086/529582
通讯作者Li, H (reprint author), Peking Univ, Dept Astron, Sch Phys, Beijing 100871, Peoples R China.
文章类型Review
英文摘要Due to the lack of low-redshift long gamma-ray bursts (GRBs), the circular problem has been a severe obstacle for using GRBs as cosmological candles. In this paper, we present a new method to deal with such a problem in Markov chain Monte Carlo (MCMC) global fitting analysis. Assuming a certain type of correlation, for the parameters involved in the correlation relation, we treat them as free parameters and determine them simultaneously with cosmological parameters through MCMC analysis on GRB data together with other observational data. Then the circular problem is naturally eliminated in this procedure. To demonstrate the feasibility of our method, we take the Ghirlanda relation (E-gamma proportional to CEpeakA) as an example, while keeping in mind the debate about its physical validity. Together with SN Ia, WMAP, and SDSS data, we include 27 GRBs with the reported Ghirlanda relation in our study and perform MCMC global fitting. We consider the Lambda CDM model and dynamical dark energy models, respectively. We also include the curvature of the universe in our analysis. In each case, in addition to the constraints on the relevant cosmological parameters, we obtain the best-fit values as well as the distributions of the correlation parameters A and C. With CMB+LSS+SNe+GRB data included in the analysis, the results on A and C for different cosmological models are in agreement well within a 1 sigma range. It is also noted that the distributions of A and C are generally broader than the priors used in many studies in the literature. Our method can be readily applied to other GRB relations, which might be better physically motivated.
类目[WOS]Astronomy & Astrophysics
收录类别SCI
WOS记录号WOS:000256500800007
引用统计
被引频次:42[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/311005/226084
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
推荐引用方式
GB/T 7714
Li, H,Xia JQ,Liu J,et al. Overcoming the circular problem for gamma-ray bursts in cosmological global-fitting analysis[J]. ASTROPHYSICAL JOURNAL,2008,680(1):#REF!.
APA Li, H.,夏俊卿.,刘杰.,张新民.,Xia, JQ.,...&Zhang, XM.(2008).Overcoming the circular problem for gamma-ray bursts in cosmological global-fitting analysis.ASTROPHYSICAL JOURNAL,680(1),#REF!.
MLA Li, H,et al."Overcoming the circular problem for gamma-ray bursts in cosmological global-fitting analysis".ASTROPHYSICAL JOURNAL 680.1(2008):#REF!.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
1077.pdf(189KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Li, H]的文章
[夏俊卿]的文章
[刘杰]的文章
百度学术
百度学术中相似的文章
[Li, H]的文章
[夏俊卿]的文章
[刘杰]的文章
必应学术
必应学术中相似的文章
[Li, H]的文章
[夏俊卿]的文章
[刘杰]的文章
相关权益政策
暂无数据
收藏/分享
文件名: 1077.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。