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arXiv 1002.3551astro-ph.SR
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太阳周期中的氢莱曼辐射

Hydrogen Lyman emission through the solar cycle

W. Curdt, H. Tian

摘要:

我们目前的观测和结果的辐射和辐照度的研究完成的SoHO-SUMER在过去的太阳周期。我们发现,在Ly-alpha辐照度的周期变化,例如UARS-SOLSTICE观察到的,不能解释安静的太阳辐射数据,并得出结论,解释必须与不同的太阳能功能的Ly-alpha辐射的差异和变化,在他们的分数分布在太阳周期。因此,我们研究了各种太阳特征中氢Ly-alpha线的发射-这是SUMER首次在磁盘上以全分辨率观察到的-以研究磁场对线轮廓和辐射分布的影响。我们还比较了准同时Ly-alpha和Ly-beta线配置文件。这种高分辨率的观测--不受地冠吸收的影响--以前从未完成过。

英文摘要:

We present observations and results of radiance and irradiance studies completed by SoHO-SUMER during the past solar cycle. We find that the cycle variation in Ly-alpha irradiance as observed by e.g. UARS-SOLSTICE can not be explained by quiet sun radiance data, and conclude that the explanation must be related to differences in the Ly-alpha radiance of various solar features and changes in their fractional distribution over the solar cycle. Consequently, we studied the emission of the hydrogen Ly-alpha line in various solar features - for the first time observed by SUMER on disk in full resolution - to investigate the imprint of the magnetic field on line profile and radiance distribution. We also compare quasi-simultaneous Ly-alpha and Ly-beta line profiles. Such high-resolution observations - not hampered by geocoronal absorption - have never been completed before.

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