A possible origin of bimodal duration distribution of gamma-ray bursts

Details A possible origin of bimodal duration distribution of gamma-ray bursts A possible origin of bimodal duration distribution of gamma-ray bursts

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ncimc..28..451t&link_type=abstract

Il Nuovo Cimento C, vol. 28, Issue 3, p.451

Physics

Scientific paper

We study the distribution of the durations of gamma-ray bursts (GRBs) in the unified model of short and long GRBs recently proposed by Yamazaki, Ioka, and Nakamura. Monte Carlo simulations show clear bimodal distributions, with lognormal-like shapes for both short and long GRBs, in a power law as well as a Gaussian angular distribution of the subjets. We find that the bimodality comes from the existence of the discrete emission regions (subjets or patchy shells) in the GRB jet.

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