Source evolution function of cosmological gamma-ray bursts.

Details Source evolution function of cosmological gamma-ray bursts. Source evolution function of cosmological gamma-ray bursts.

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jkps...34..459k&link_type=abstract

Journal of the Korean Physical Society, Vol. 34, No. 5, p. 459 - 462

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Gamma-Ray Bursts: Cosmology

Scientific paper

The authors test several possible source evolution functions of gamma-ray bursts (GRBs) by using the (V/Vmax) statistic. Based on the star-formation-rate (SFR)-related source evolution function and the standard candle assumption, they consider an exponential function and compare it with two other source evolutionary scenarios, a constant number density (no evolution) and a broken power-law function evolution. Although the observed GRBs are well accounted for by using the standard model with a constant number density, they show that when the widths are sufficiently broad (Δz > 2.0), the assumed Gaussian-Like functions can also fit the observed (V/Vmax) within a 3σ significance level. They conclude that sharply peaked source evolution functions are ruled out.

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