Solar minimum streamer densities and temperatures using Whole Sun Month coordinated data sets

被引:140
作者
Gibson, SE
Fludra, A
Bagenal, F
Biesecker, D
Del Zanna, G
Bromage, B
机构
[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[2] Catholic Univ Amer, Washington, DC 20064 USA
[3] Rutherford Appleton Lab, Dept Space Sci, Didcot OX11 0QX, Oxon, England
[4] Univ Colorado, Boulder, CO 80303 USA
[5] Space Applicat Corp, Greenbelt, MD USA
[6] Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England
关键词
D O I
10.1029/98JA02681
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We model electron densities of the simplest, most symmetric solar minimum streamer structure observed during the Whole Sun Month (WSM) campaign, using coronal observations of both visible white light and extreme ultraviolet (EUV) emission. Using white light data from the SOHO/LASCO/C2 and HAO/ Mauna Loa Mark 3 coronagraphs, we determine electron densities by way of a Van de Hulst inversion. We compare the white light densities to those determined from the density sensitive EUV line ratios of Si IX 350/342 Angstrom observed by the SOHO/coronal diagnostic spectrometer (CDS). Moreover, from the white light density profiles we calculate hydrostatic temperature profiles and compare to temperatures derived from the Si XII/Mg X line ratio. We find the white light and spectral analysis produce consistent density and temperature information.
引用
收藏
页码:9691 / 9699
页数:9
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