Gamma‐Ray Bursts are Produced Predominately in the Early Universe
Author(s) -
Jie Lin,
ShuangNan Zhang,
T. P. Li
Publication year - 2004
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/382503
Subject(s) - gamma ray burst , physics , astrophysics , luminosity , cosmic distance ladder , distribution (mathematics) , intensity (physics) , space (punctuation) , astronomy , optics , redshift , mathematics , mathematical analysis , galaxy , linguistics , philosophy
It is known that some observed gamma-ray bursts (GRBs) are produced atcosmological distances and that the GRB production rate may follow the starformation rate. We model the BATSE-detected intensity distribution of long GRBsin order to determine their space density distribution and opening angledistribution. Our main results are: the lower and upper distance limits to theGRB production are z 0.24 and >10, respectively; the GRB opening angle followsan 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 totalenergy of a GRB.Comment: 12 pages, 2 figur
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