Parametric excitation of an extremely low-frequency radio pulse by an extragalactic gamma-ray burst on December 27, 2004
Parametric excitation of an extremely low-frequency radio pulse by an extragalactic gamma-ray burst on December 27, 2004
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2004 年 12 月 27 日河外伽马射线暴对极低频射电脉冲的参量激发
DOI：
10.1007/s11141-010-9219-7
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发表时间：
2010
影响因子：
0.8
通讯作者：
A. Nickolaenko
中科院分区：
文献类型：
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作者：
A. Nickolaenko
我们模拟了由带电的地球-电离层空腔上壁的急剧下降所激发的电磁脉冲。在人马座（SGR 1806-20）发生巨大的河外伽马射线爆发期间，在地球半球的向阳面探测到电离层下降了20公里。我们表明，电离层高度的急剧变化可以导致一个离散的脉冲极低频辐射的频谱具有一些特定的功能和幅度显着超过自然的常规噪声背景。无线电脉冲到达观测者的时间与伽玛暴的时间一致。
We simulate an electromagnetic pulse excited by a sharp descent of the charged upper wall of the Earth–ionosphere cavity. The ionosphere descent by 20 km was detected over the dayside Earth’s hemisphere during a giant extragalactic gamma-ray burst in the constellation of Sagittarius (SGR 1806–20). We show that a sharp change in the ionosphere altitude can cause a discrete pulse of extremely low-frequency radiation with the spectrum having some specific features and the amplitude significantly exceeding the natural regular noise background. The time of arrival of the radio pulse to an observer coincides with the gamma-burst time.
影响因子：
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作者：
Y. Tanaka;T. Terasawa;M. Yoshida;T. Horie;M. Hayakawa
通讯作者：
Y. Tanaka;T. Terasawa;M. Yoshida;T. Horie;M. Hayakawa