Eur. Phys. J. C (2009) 60: 449-455
https://doi.org/10.1140/epjc/s10052-009-0891-8

Regular Article - Theoretical Physics

Cosmological models and latest observational data

Department of Physics, Beijing Institute of Technology, Beijing, 100081, China

^* e-mail: haowei@bit.edu.cn

Received: 2 October 2008
Revised: 4 December 2008
Published online: 25 February 2009

Abstract

In this note, we consider the observational constraints on some cosmological models by using the 307 Union type Ia supernovae (SNIa), the 32 calibrated gamma-ray bursts (GRBs) at z>1.4, the updated shift parameter R from WMAP 5-year data (WMAP5), and the distance parameter A of the measurement of the baryon acoustic oscillation (BAO) peak in the distribution of SDSS luminous red galaxies with the updated scalar spectral index n _s from WMAP5. The tighter constraints obtained here update the ones obtained previously in the literature.