| タイトル | An ultraviolet spectral atlas of a sunspot and an active region 1190-1730 A |
| 著者（英） | Kjeldseth-Moe, O.; Brekke, P.; Bartoe, J.-D. F.; Brueckner, G. E. |
| 著者所属（英） | Oslo Univ.|Naval Research Lab. |
| 発行日 | 1991-04-01 |
| 言語 | eng |
| 内容記述 | An ultraviolet spectral atlas of a sunspot with high spectral and spatial resolution in the wavelength region 1190-1730 A is presented. The atlas contains spectra of three different areas in the sunspot and also of an active region and a quiet region. The selected areas are averaged over several arcsec, ranging from 3.5 arcsec in the sunspot to 18 arcsec in the quiet region. Brief descriptions of the data reduction and calibration procedures are given. The absolute intensities are determined with an accuracy of + or - 30 percent and the wavelength scale is accurate to better than 0.01 A. The transition region lines show the most extreme example known of downflowing gas above a sunspot, a phenomenon which seems to be commonly connected to sunspots. |
| NASA分類 | SOLAR PHYSICS |
| レポートNO | 91A30333 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/349347 |
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