The distances of cosmic γ-ray bursts and their distribution

Details The distances of cosmic γ-ray bursts and their distribution The distances of cosmic γ-ray bursts and their distribution

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cha%26a..28..154w&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 28, Issue 2, p. 154-159.

Astronomy and Astrophysics

Astrophysics

Galaxies: Jets, Gamma Rays: Bursts

Scientific paper

Taking the effect of the expansion of the universe, jet effect and the association of γ-ray bursts with supernovae into consideration, we have studied the space distribution of γ-ray bursts. Assuming a Gaussian distribution of the opening angle and that the rate of bursts is proportional to the rate of star formation, we find the best fitting parameters to be φ0=0.1, and σ=0.04, implying that the opening angles are concentrated about O.1 rad, in agreement with the current analyses on γ-ray bursts with known redshifts. The maximum redshift calculated from < V/Vmax > is 4.2, and the energy of γ-ray burst is 1.5 × 1051 ergs.

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