期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 700, 期 1, 页码 L47-L50出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/700/1/L47
关键词
gamma rays: bursts; hydrodynamics; methods: numerical; radiation mechanisms: thermal; relativity
资金
- NASA ATP [NNG06GI06G]
- Swift GI program [NNX06AB69G, NNX08BA92G]
We numerically analyze the evolution of a long-duration gamma-ray burst jet as it leaves the progenitor star and propagates to the photospheric radius, where radiation can be released. We find that the interaction of the relativistic material with the progenitor star has influences well beyond the stellar surface. Tangential collimation shocks are observed throughout the jet evolution, out to about 100 stellar radii, which is the whole range of our simulation. We find that the jet is internally hot at the photospheric radius and we compute the photospheric emission. The photosphere is a very efficient radiator, capable of converting more than half of the total energy of the jet into radiation. We show that bright photospheres are a common feature of jets born inside massive progenitor stars and that this effect can explain the high radiative efficiency observed in long-duration bursts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据