A unified model of short and long gamma-ray bursts, X-ray rich gamma-ray bursts, and X-ray flashes

Ryo Yamazaki; Kunihito Ioka; Takashi Nakamura; Kenji Toma

doi:10.1016/j.asr.2005.06.006

A unified model of short and long gamma-ray bursts, X-ray rich gamma-ray bursts, and X-ray flashes

Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura, Kenji Toma

Advanced Interdisciplinary Research Division

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We propose a possible unified model of short and long gamma-ray bursts (GRBs), X-ray rich GRBs, and X-ray flashes. The jet of a GRB is assumed to consist of multiple sub-jets or sub-shells (i.e., an inhomogeneous jet model). The multiplicity of the sub-jets 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 = 1, the event looks like a short GRB. Finally, when n _s = 0, the event looks like an X-ray flash or an X-ray rich GRB. Furthermore, our model may also explain the bimodal distributions of T ₉₀ duration of BATSE-GRBs.

Original language	English
Pages (from-to)	1299-1302
Number of pages	4
Journal	Advances in Space Research
Volume	38
Issue number	7
DOIs	https://doi.org/10.1016/j.asr.2005.06.006
Publication status	Published - 2006

Keywords

Gamma rays: theory
Gamma-ray bursts

ASJC Scopus subject areas

Aerospace Engineering
Astronomy and Astrophysics
Geophysics
Atmospheric Science
Space and Planetary Science
Earth and Planetary Sciences(all)

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abstract = " We propose a possible unified model of short and long gamma-ray bursts (GRBs), X-ray rich GRBs, and X-ray flashes. The jet of a GRB is assumed to consist of multiple sub-jets or sub-shells (i.e., an inhomogeneous jet model). The multiplicity of the sub-jets 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 = 1, the event looks like a short GRB. Finally, when n s = 0, the event looks like an X-ray flash or an X-ray rich GRB. Furthermore, our model may also explain the bimodal distributions of T 90 duration of BATSE-GRBs.",

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T1 - A unified model of short and long gamma-ray bursts, X-ray rich gamma-ray bursts, and X-ray flashes

AU - Yamazaki, Ryo

AU - Ioka, Kunihito

AU - Nakamura, Takashi

AU - Toma, Kenji

PY - 2006

Y1 - 2006

N2 - We propose a possible unified model of short and long gamma-ray bursts (GRBs), X-ray rich GRBs, and X-ray flashes. The jet of a GRB is assumed to consist of multiple sub-jets or sub-shells (i.e., an inhomogeneous jet model). The multiplicity of the sub-jets 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 = 1, the event looks like a short GRB. Finally, when n s = 0, the event looks like an X-ray flash or an X-ray rich GRB. Furthermore, our model may also explain the bimodal distributions of T 90 duration of BATSE-GRBs.

AB - We propose a possible unified model of short and long gamma-ray bursts (GRBs), X-ray rich GRBs, and X-ray flashes. The jet of a GRB is assumed to consist of multiple sub-jets or sub-shells (i.e., an inhomogeneous jet model). The multiplicity of the sub-jets 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 = 1, the event looks like a short GRB. Finally, when n s = 0, the event looks like an X-ray flash or an X-ray rich GRB. Furthermore, our model may also explain the bimodal distributions of T 90 duration of BATSE-GRBs.

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KW - Gamma-ray bursts

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