Flare observation of the Sun as a star by SUMER/SOHO in the hydrogen Lyman continuum
Flare observation of the Sun as a star by SUMER/SOHO in the hydrogen Lyman continuum
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SUMER/SOHO 在氢莱曼连续谱中对太阳作为恒星的耀斑观测
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
K. Wilhelm
中科院分区：
文献类型：
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作者：
P. Lemaire;P. Gouttebroze;J. Vial;W. Curdt;U. Schühle;K. Wilhelm
在“太阳是一颗恒星”项目执行期间，当SUMER（太阳紫外线发射）/SOHO（太阳和日光层天文台）狭缝收集远离太阳圆盘图像的望远镜镜面散射辐射时，2001年8月25日，太阳圆盘上爆发了X5.3/3b级耀斑。在耀斑的第一阶段，在氢莱曼连续体的头部检测到几个百分点的相对增加。经过仪器参数校正后，Lyman连续体（910 A）头部的相对信号增加了70%，C904a多路的相对信号增加了190%。考虑到耀斑区域的面积，莱曼连续体和C线的局部亮度增加估计为几千倍。我们将这一结果与其他太阳观测和模型进行比较。
During the execution of the programme "Sun as a star", while the SUMER (Solar Ultraviolet Emission of Emitted Radiation)/SOHO (SOlar and Heliospheric Observatory) slit was collecting the scattered radiation from the telescope mirror far away from the solar disk image, a class X5.3/3b flare erupted on the solar disk, on 25 August 2001. During the first phase of the flare a relative increase of a few percent was detected at the head of the hydrogen Lyman continuum. After correction from the instrumental parameters, the relative signal increase is 70% at the head of the Lyman continuum (910 A), and 190% in the C 904 A multiplet. Accounting for the area of the flare region, the local increase of the radiance of the Lyman continuum and of the C lines is estimated to be a factor of several thousands. We compare this result with other solar observations and models.