TL;DR
This paper uses recent observational data from supernovae, gamma-ray bursts, WMAP5, and BAO to constrain cosmological models, providing tighter bounds than previous studies.
Contribution
It offers updated constraints on cosmological models by incorporating the latest observational data from multiple sources.
Findings
Tighter constraints on cosmological models achieved.
Inclusion of latest WMAP5 and BAO data improves parameter bounds.
Enhanced understanding of cosmological parameters with new observational datasets.
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 , the updated shift parameter from WMAP 5-year data (WMAP5), and the distance parameter of the measurement of the baryon acoustic oscillation (BAO) peak in the distribution of SDSS luminous red galaxies with the updated scalar spectral index from WMAP5. The tighter constraints obtained here update the ones obtained previously in the literature.
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