2004/01/31 by Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura · 10 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astronomy and Astrophysical Research #Earth Systems and Cosmic Evolution #Gamma-ray bursts and supernovae #astro-ph
paper · pdf · doi:10.1086/421872
published as Astrophys.J. 607 (2004) L103-L106 · 13 pages, 4 eps figures
openalex publication_date 2004/04/27 · arxiv created 2004/05/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
Taking into account the recent suggestion that a short gamma-ray burst (GRB) looks like the first 1 s of a long GRB, we propose that the jet of a GRB consists of multiple subjets or subshells (i.e., an inhomogeneous jet model). The multiplicity of the subjets along a line of sight n s is an important parameter. If n s is large (≫1) the event looks like a long GRB, while if n s is small (~1) the event looks like a short GRB. If our line of sight is off-axis to any subjets, the event looks like an X-ray flash or an X-ray-rich GRB. The lognormal distribution of durations of short and long GRBs are also suggested in the same model.