Recent progress in GRB cosmology: combination of GRBs and other probes
It was widely shown that the cosmological parameters and dark energy can be constrained by using data from type-Ia supernovae (SNe Ia), cosmic microwave background (CMB) anisotropy, cosmic large scale structure, and so on. Recently gamma-ray bursts (GRBs) were also argued to be promising standard candles for cosmography. In this paper, we summarize the results of Wang et al. (2007). We present constraints on the cosmological parameters and dark energy by combining a recent GRB sample with other cosmological probes. We find that for the ACDM cosmology this combination makes the constraints stringent and the best fit is close to the fiat universe. We also find that several dark energy models used usually are consistent with the ACDM cosmology. Furthermore, we reconstruct the dark energy equation-of-state parameter w (z) and the deceleration parameter q (z), and obtain the transition redshift of cosmic past deceleration to present acceleration.
dark energy gamma-ray bursts
Dai, Z. G. Wang, E Y.
Department of Astronomy, Nanjing University, Nanjing 210093, China
国际会议
紧凑型物体的天体物理学国际会议(International Conference on Astrophysics of Compact Objects)
安徽黄山
英文
18-25
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）