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首页> 外文期刊>Earth, planets and space: EPS >MHD wave characteristics inferred from correlations between X-rays, VLF, and ULFs at Syowa Station, Antarctica and Tjornes, Iceland(L approx 6)
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MHD wave characteristics inferred from correlations between X-rays, VLF, and ULFs at Syowa Station, Antarctica and Tjornes, Iceland(L approx 6)

机译：由冰岛南极洲和特约恩斯Syowa站的X射线，VLF和ULF之间的相关性推断出的MHD波特征（L约6）

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摘要

The Polar Patrol Balloon No. 6 (PPB#6) observed quasi-periodic pulsations of bremsstrahlung X-rays( E=30 approx 120 keV) in the daytime of 0855 UT (0914 MLT) approx 1630 UT (1614 MLT) on January 5,1993, near Syowa Station, Antarctica (L approx 6). The X-ray pulsations near the noon (1208:00 UT (1216 MLT) approx 1225:04 UT (1232 MLT) include a period of about 260 sec, which corresponds to Pc 5 magnetic pulsations. It was found that at Syowa Station and Tjornes, Iceland, which are both pair locations of the geomagnetic conjugacy, the X-ray pulsations are in correlation with the ULF-D pulsations. Also the Tjornes VLF (2 kHz) pulsations correlated well with the X-ray pulsations of the period corresponding to Pc 5. It is probable that the VLF-and ULF-associated X-rays or precipitating energetic electrons in the vicinity of the L approx 6 shell are in synchronization with the electron-cyclotron resonance. Lastly, the so-called ballooning-mirror instability (the BMI) is a candidate to explain the compressional MHD waves that occur during the short time interval (1216 MLT approx 1232 MLT) in which the experimental results were interpreted.
机译：6月的Polar Patrol气球（PPB＃6）在1855年1月5日UT（0914 MLT）约1630 UT（1614 MLT）的白天观测到了stra致辐射X射线（E = 30约120 keV）的准周期脉动，1993年，南极Syowa站附近（L约6）。中午（1208：00 UT（1216 MLT）大约1225：04 UT（1232 MLT）附近的X射线脉动包括大约260秒的周期，这对应于Pc 5磁脉冲。冰岛的Tjornes都是地磁共轭的成对位置，X射线脉动与ULF-D脉动相关，Tjornes VLF（2 kHz）脉动与相应周期的X射线脉动也很好相关到Pc5。大约在L大约6壳附近的与VLF和ULF相关的X射线或沉淀的高能电子很可能与电子回旋共振同步。不稳定性（BMI）是解释在短时间间隔（1216 MLT约1232 MLT）期间发生的压缩MHD波的候选者，其中解释了实验结果。

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