| Hydrodynamic Evolution of GRB Afterglow |
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| 作者姓名： | Ji－RongMao Jian－ChengWang |
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| 作者单位： | Yunnan Observatory，Chinese Academy of Sciences，Kunming 650011; National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012; United Laboratory of Optical Astronomy，Chinese Academy of Sciences |
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| 摘 要： | 1 INTRODUCTIONMom the detection at X-rap optical and radio wavelengths of ganuna-ray bursts (GRBs)since 1997 (Costa et al. 1997; van Paradijs et al. 1997; Sahu et al. 1997; Djorgovsld et al. 1997;Metzger et al. 1997; Frail et al. 1997; Taylor et al. 1997; Kulforni et al. 1998; Halpern et al.1998; Castro-Tirado et al. 1999; Kulkalni et al. 1999; Galama et al. 1999), we have come toknow that the GRBs can release 1051 ~ 1054 ergs in a few seconds and that the fireball modelcan describ…
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| 关 键 词： | 伽玛射线 短波 液体力学 演化 动力学 火球 |
Hydrodynamic Evolution of GRB Afterglow |
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| Ji-Rong Mao and Jian-Cheng Wang.Hydrodynamic Evolution of GRB Afterglow[J].Chinese Journal of Astronomy and Astrophysics,2001,1(4):349-356. |
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| Authors: | Ji-Rong Mao and Jian-Cheng Wang |
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| Institution: | [1]YunnanObservatory,ChineseAcademyofSciences,Kunming650011 [2]NationalAstronomicalObservatories,ChineseAca |
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| Abstract: | We investigate the dynamics of a relativistic fireball which decelerates as it sweeps up ambient matter. Not only the radiative and adiabatic cases,but also the realistic intermediate cases are calculated. We perform numerical calculation for various ambient media and sizes of beaming expansion, and find that the deceleration radius R0 may play an important role for the hydrodynamic evolution of GRB afterglow. |
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| Keywords: | gamma-rays: bursts - hydrodynamics - shock waves |
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