Cosmology-Independent Distance Moduli of 42 Gamma-Ray Bursts between Redshift of 1.44 and 6.60

摘要：

This report is an npdate and extension of our paper accepted for publication in ApJ(arXiv：0802．4262)．Sinceobjects at the same redshift should have the same luminosity distance and the distance moduli of type Ia supernovae(SNeIa) obtained directly from observations are completely cosmology independent,we obtain t11e distance modulus of a gamma-ray burst(GRB)at a given redshift by interpolating or iterating from the Hubble diagram of SNe Ia．Then we calibrate fiveGRB relations without assuming a particular cosmological model,from different regression methods,and construct the GRBHubble diagram to constrain cosmological parameters．Based upon these relations we list the cosmology-independent distancemoduli of 42 GRBs between redshift of 1.44 and 6.60,with the 1-σuncertainties of 1-3％．

关键词： Observational cosmology-gamma-ray bursts

作者: Nan Liang Shuang Nan Zhang

作者单位: Department of Physics and Center for Astrophysics,Tsinghua University,Beijing 100084,China

会议类型: 国际会议

会议名称: 2008 NanJing Gamma-Ray Burst Conference(2008年伽马暴国际研讨会)

会议地点: 南京

会议语种:英文

页码: 367-372

在线出版日期: 2008-06-23（万方平台首次上网日期，不代表论文的发表时间）