Distance Scale and Distribution of the Cosmological gamma-ray Bursts

Details Distance Scale and Distribution of the Cosmological gamma-ray Bursts Distance Scale and Distribution of the Cosmological gamma-ray Bursts

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acasn..45...42w&link_type=abstract

Acta Astronomica Sinica, vol. 45, no. 1, p. 42-47

Astronomy and Astrophysics

Astronomy

Galaxies: Jets, Gamma Rays: Bursts

Scientific paper

Gamma-ray burst is an astronomical phenomenon of short duration enhancement of gamma-rays from cosmic space. Considering the effect of the expansion of the universe, beaming effect and the evidence that gamma ray bursts are close to star-forming regions, we study the distribution of the gamma ray bursts. Assuming the opening angle follows Gauss distribution and gamma ray bursts follow the measured star formation rate, we find the best parameters that fit the theory are ?0=0.1,?=0.04.This shows that the most common angle is about 0.1rad, in rough agreement with samples whose redshift haven been known. The calculated maximum redshift fromis 4.2 and the energy of the gamma-ray burst is 1.5×1051ergs.

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