DYNAMICAL EVOLUTION OF AN ULTRA-RELATIVISTIC FIREBALL COLLIDING WITH A FREELY EXPANDING GAS
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説明
We investigate the hydrodynamical evolution of an ultra-relativistic fireball colliding with a freely expanding gas. The hydrodynamical interaction of the fireball and the gas results in the formation of a geometrically thin shell. We study the dynamical evolution of the shell analytically and perform a numerical simulation equipped with adaptive mesh refinement to investigate the internal structure of the shell. The shocked gas can give rise to bright emission in the X-ray and gamma-ray energy range. We propose that the breakout emission from the forward shock and the photospheric emission from the reverse-shocked fireball contribute to early gamma-ray emission from gamma-ray bursts.
収録刊行物
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- The Astrophysical Journal
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The Astrophysical Journal 796 (1), 30-, 2014-11-20
American Astronomical Society
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詳細情報 詳細情報について
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- CRID
- 1050845760729885184
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- NII論文ID
- 120005522508
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- NII書誌ID
- AA00553242
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- ISSN
- 0004637X
- 15384357
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- HANDLE
- 2433/192486
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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