TY - JOUR
T1 - Reconstructing the cosmic expansion history up to redshift z=6.29 with the calibrated gamma-ray bursts
AU - Wei, Hao
AU - Nan Zhang, Shuang
PY - 2009/9
Y1 - 2009/9
N2 - Recently, Gamma-Ray Bursts (GRBs) were proposed to be a complementary cosmological probe to type Ia supernovae (SNIa). GRBs have been advocated to be standard candles since several empirical GRB luminosity relations were proposed as distance indicators. However, there is a so-called circularity problem in the direct use of GRBs. Recently, a new idea to calibrate GRBs in a completely cosmology independent manner has been proposed, and the circularity problem can be solved. In the present work, following the method proposed by Liang et al., we calibrate 70 GRBs with the Amati relation using 307 SNIa. Then, following the method proposed by Shafieloo et al., we smoothly reconstruct the cosmic expansion history up to redshift z=6.29 with the calibrated GRBs. We find some new features in the reconstructed results.
AB - Recently, Gamma-Ray Bursts (GRBs) were proposed to be a complementary cosmological probe to type Ia supernovae (SNIa). GRBs have been advocated to be standard candles since several empirical GRB luminosity relations were proposed as distance indicators. However, there is a so-called circularity problem in the direct use of GRBs. Recently, a new idea to calibrate GRBs in a completely cosmology independent manner has been proposed, and the circularity problem can be solved. In the present work, following the method proposed by Liang et al., we calibrate 70 GRBs with the Amati relation using 307 SNIa. Then, following the method proposed by Shafieloo et al., we smoothly reconstruct the cosmic expansion history up to redshift z=6.29 with the calibrated GRBs. We find some new features in the reconstructed results.
UR - http://www.scopus.com/inward/record.url?scp=69549127955&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-009-1086-z
DO - 10.1140/epjc/s10052-009-1086-z
M3 - Article
AN - SCOPUS:69549127955
SN - 1434-6044
VL - 63
SP - 139
EP - 147
JO - European Physical Journal C
JF - European Physical Journal C
IS - 1
ER -