Work

A Unified Model of Short and Long Gamma-Ray Bursts, X-Ray-rich Gamma-Ray Bursts, and X-Ray Flashes

Year: 2004

Type: article

Abstract: 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.

Source: The Astrophysical Journal

DOI: 10.1086/421872

Authors: Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura

Institutions: Kyoto University, The University of Osaka

Language: English

Topic: Gamma-ray bursts and supernovae

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science

Awards: The most distant Gamma-Ray Burst and the first star, 重力波源と波形の研究