Time dilation and the star formation scenario

Details Time dilation and the star formation scenario Time dilation and the star formation scenario

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..138..515d&link_type=abstract

Astronomy and Astrophysics Supplement, v.138, p.515-516

Astronomy and Astrophysics

Astrophysics

Gamma-Rays: Bursts

Scientific paper

We investigate the dependence of the redshift vs. brightness relation of GRBs upon the width of GRB luminosity function and the cosmological models. The relation is then fit to our observed time dilation data of GRBs. It is found that the best fit average luminosity ranges from L0 = 1.1 +/- 0.3 \ 10(57) \ photons \ s(-1) in a standard candle luminosity model to = 8.7 +/- 3.6 \ 10(57) \ photons \ s(-1) in a cosmological model with a broad luminosity function phi (L) = C * L(-beta ) . Our fits suggest that it is only possible to accomodate the large distance scale suggested by the Star Formation Rate model when the luminosity function has a large width K ~ 1000 in a cosmological model with low matter density Omega_ {0}.

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