X-Ray Expanding Features Associated with a Moreton Wave
X-Ray Expanding Features Associated with a Moreton Wave
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DOI：
10.1093/pasj/56.2.l5
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发表时间：
2004-04
影响因子：
2.3
通讯作者：
Narukage Noriyuki;T. Morimoto;Miwako Kadota;R. Kitai;H. Kurokawa;K. Shibata
中科院分区：
文献类型：
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作者：
Narukage Noriyuki;T. Morimoto;Miwako Kadota;R. Kitai;H. Kurokawa;K. Shibata
本文报道了在靠近太阳翼的软x射线中同时观测到Hα中的一个摩尔顿波和两种日冕膨胀特征。我们将较快的x射线特征和较慢的x射线特征分别视为“x射线波”和“喷射物”。色球莫尔顿波以1040±100 kms−1的速度在太阳盘上传播，而日冕x射线波以1400±250kms−1的速度在日冕外传播。我们将x射线波确定为MHD快模激波。估计x射线波的快模马赫数（Mf）约为1.13-1.31，在传播过程中减小。Mf变为“1”的时间与摩尔顿波消失的时间一致。此外，我们还讨论了激波的三维结构以及激波与喷出物（和α长丝喷发）的关系。
We report on the simultaneous observation of a Moreton wave in Hα and two kinds of coronal expanding features in soft X-rays near the solar limb. We consider the faster X-ray feature and the slower one as being an “X-ray wave” and “ejecta”, respectively. The chromospheric Moreton wave propagated on the solar disk at a speed of 1040± 100 km s−1, whereas the coronal X-ray wave propagated outside of the disk toward the outer corona at 1400± 250kms−1. We identified the X-ray wave as MHD fast-mode shock. The fast-mode Mach number (Mf) of the X-ray wave was also estimated to be about 1.13–1.31, which decreases during propagation. The timing when the Mf became “1” is consistent with that of the disappearance of the Moreton wave. Moreover, we discuss the 3-dimensional structure of the shock wave and the relation between the shock wave and the ejecta (and Hα filament eruptions).