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Method of determining cosmological parameter ranges with samples of candles with an intrinsic distribution
Tan YP(覃一平)1,2; Zhang BB(张彬彬)1,3; Dong YM(董云明)1,3; Zhang FW(张富文)1,2,3; Li HZ(李怀珍)1,3; Jia LW(贾兰伟)1,3; Mao LS(毛李胜)1,3; Lu RJ(陆睿静)1,2,3; Yi, Ting-Feng2; Cui XH(崔晓红)1,3; Zhang ZB(张志彬)1,3
发表期刊CHINESE PHYSICS
2006-07
卷号15期号:7页码:1645-1652
DOI10.1088/1009-1963/15/7/044
产权排序第1完成单位
收录类别SCI ; EI
关键词Cosmological Parameters Observational Cosmology Distance Scale
摘要

In this paper, the effect of the intrinsic distribution of cosmological candles is investigated. We find that in the case of a narrow distribution the deviation of the observed modulus of sources from the expected central value can be estimated within a ceratin range. We thus introduce lower and upper limits of chi(2), chi(2)(min) and chi(2)(max) to estimate cosmological parameters by applying the conventional minimizing chi(2) method. We apply this method to a gamma-ray burst (GRB) sample as well as to a combined sample including this GRB sample and an SN Ia sample. Our analysis shows that: a) in the case of assuming an intrinsic distribution of candles of the GRB sample, the effect of the distribution is obvious and should not be neglected; b) taking into account this effect would lead to a poorer constraint of the cosmological parameter ranges. The analysis suggests that in the attempt of constraining the cosmological model with current GRB samples, the results tend to be worse than was previously anticipated if the mentioned intrinsic distribution does exist.

语种英语
学科领域天文学 ; 星系与宇宙学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN1009-1963
URL查看原文
归档日期2006-06-29
WOS记录号WOS:000239006600044
WOS研究方向Physics
WOS类目Physics, Multidisciplinary
关键词[WOS]Gamma-ray Bursts ; High-redshift Supernovae ; Probe Wmap Observations ; Hubble-space-telescope ; Equation-of-state ; Dark Energy ; Cardassian Expansion ; Observational Constraints ; Ia Supernovae ; Angular Size
EI入藏号20062910009786
EI主题词Cosmic Rays
EI分类号657space Physics - 721.1computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 731.1control Systems - 921mathematics - 931.3atomic And Molecular Physics
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/7002
专题星系研究组
通讯作者Tan YP(覃一平)
作者单位1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.Physics Department, Guangxi University, Nanning, Guangxi 530004, China
3.The Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式
GB/T 7714
Tan YP,Zhang BB,Dong YM,et al. Method of determining cosmological parameter ranges with samples of candles with an intrinsic distribution[J]. CHINESE PHYSICS,2006,15(7):1645-1652.
APA Tan YP.,Zhang BB.,Dong YM.,Zhang FW.,Li HZ.,...&Zhang ZB.(2006).Method of determining cosmological parameter ranges with samples of candles with an intrinsic distribution.CHINESE PHYSICS,15(7),1645-1652.
MLA Tan YP,et al."Method of determining cosmological parameter ranges with samples of candles with an intrinsic distribution".CHINESE PHYSICS 15.7(2006):1645-1652.
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