Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011acasn..52..467l&link_type=abstract
Acta Astronomica Sinica, vol. 52, no. 6, p. 467-480
Astronomy and Astrophysics
Astronomy
Gamma-Ray Burst: General, Cosmology: Cosmographic Parameters, Cosmology: Dark Energy
Scientific paper
We use the newly released Union2 SNe Ia dataset to constrain cosmographic parameters, namely deceleration, jerk and snap parameters (q_0,j_0 and s_0), then calibrate five luminosity relations of gamma-ray bursts (GRBs) at redshift z≤1.4. Supposing that the GRB luminosity relations do not evolve with redshift, we obtain the distance moduli of 66 high-redshift GRBs. At last, we combine the observation datasets including Cosmic Microwave Background, Baryon Acoustic Oscillations and 116 GRBs to constrain some widely-discussed dark energy models. We find the ΛCDM model is the best according to the Bayesian Information Criterion, and the JBP model is the best according to the Akaike Information Criterion.
Liu J. W.
Wang Feng-Yu
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