| Cylindrical Jet—Wind interaction Model of Gamma—Ray Burst Afterglows |
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| 作者姓名： | Hai-Tao Ma Yong-Feng Huang Zi-Gao Dai and Tan Lu |
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| 作者单位： | Hai-Tao Ma,Yong-Feng Huang,Zi-Gao Dai and Tan Lu Department of Astronomy,Nanjing University,Nanjing 210093; hyf@nju.edu.cn |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | Observations on relativistic jets in radio galaxies, active galactic nuclei, and "microquasars" revealed that many of these outflows are cylindrical, not conical. So it is worthwhile to investigate the evolution of cylindrical jets in gamma-ray bursts. We discuss afterglows from cylindrical jets in a wind environment. Numerical results as well as analytic solutions in some special cases are presented. Our light curves are steeper compared to those in the homogeneous interstellar medium case, carefully considered by Cheng, Huang & Lu. We conclude that some afterglows, used to be interpreted as isotropic fireballs in a wind environment, can be fitted as well by cylindrical jets interacting with a wind.
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| 关 键 词： | 伽玛射线 射电星系 活动星系核 星际介质 余辉 火球模型 中子 |
Cylindrical Jet-Wind Interaction Model of Gamma-Ray Burst Afterglows |
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| Hai-Tao Ma,Yong-Feng Huang,Zi-Gao Dai and Tan Lu.Cylindrical Jet-Wind Interaction Model of Gamma-Ray Burst Afterglows[J].Chinese Journal of Astronomy and Astrophysics,2003,3(3):225-234. |
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| Authors: | Hai-Tao Ma Yong-Feng Huang Zi-Gao Dai TAN Lu |
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| Abstract: | Observations on relativistic jets in radio galaxies, active galactic nuclei, and "microquasars" revealed that many of these outflows are cylindrical, not conical. So it is worthwhile to investigate the evolution of cylindrical jets in gamma-ray bursts. We discuss afterglows from cylindrical jets in a wind environment. Numerical results as well as analytic solutions in some special cases are presented. Our light curves are steeper compared to those in the homogeneous interstellar medium case, carefully considered by Cheng, Huang & Lu. We conclude that some afterglows, used to be interpreted as isotropic fireballs in a wind environment, can be fitted as well by cylindrical jets interacting with a wind. |
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| Keywords: | gamma-rays: bursts - ISM: jets and outflows - radiation mechanisms: non-thermal - stars: neutron |
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