| タイトル | The O VII soft X-ray spectrum and its application to hot plasmas in astrophysics |
| 著者（英） | Acton, L. W.; Bely-Dubau, F.; Gabriel, A. H.; Faucher, P. |
| 著者所属（英） | Observatoire de la Cote d'Azur|Lockheed Missiles and Space Co. |
| 発行日 | 1991-09-01 |
| 言語 | eng |
| 内容記述 | The paper presents a revised theory and atomic model for the line intensities emitted by O VII, taking into account all of the processes responsible for the emission. This is used to provide a revision of the density measurements made for solar active regions and during flares, as well as an attempt to understand the spectrum of the Puppis A supernova remnant. In order to explain the strange intensity ratios observed from Puppis A, previous authors have proposed an interpretation based upon a high-temperature thermal plasma in a nonequilibrium ionization state. An alternative model is presented here, based upon the assumed presence of a proportion of fast, nonthermal electrons imbedded in an otherwise thermal plasma at a temperature below 10 to the 6th K. This can adequately explain the observations without the necessity of invoking departures from the ionization balance. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 91A50518 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/346017 |
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