Gamma-Ray Bursts are Produced Predominately in the Early Universe

Details Gamma-Ray Bursts are Produced Predominately in the Early Universe Gamma-Ray Bursts are Produced Predominately in the Early Universe

2003-11-16

arxiv.org/abs/astro-ph/0311363v2

Astrophys.J. 605 (2004) 819-822

Astronomy and Astrophysics

Astrophysics

12 pages, 2 figure

Scientific paper

10.1086/382503

It is known that some observed gamma-ray bursts (GRBs) are produced at cosmological distances and that the GRB production rate may follow the star formation rate. We model the BATSE-detected intensity distribution of long GRBs in order to determine their space density distribution and opening angle distribution. Our main results are: the lower and upper distance limits to the GRB production are z 0.24 and >10, respectively; the GRB opening angle follows an exponential distribution and the mean opening angle is about 0.03 radians; and the peak luminosity appears to be a better standard candle than the total energy of a GRB.

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