Non-thermal velocities in flare plasmas
| Autor: | Ester Antonucci, Carlo Benna, M. A. Dodero, R. Martin |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Physics
Atmospheric Science Solar flare Astrophysics::High Energy Astrophysical Phenomena Aerospace Engineering Astronomy and Astrophysics Astrophysics Plasma Solar maximum Corona Spectral line Nanoflares law.invention Geophysics Space and Planetary Science law Physics::Space Physics Astrophysics::Solar and Stellar Astrophysics General Earth and Planetary Sciences Chromosphere Flare |
| Zdroj: | Advances in Space Research. 17:47-50 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/0273-1177(95)00539-q |
| Popis: | The analysis of the profile and intensity of the soft X-ray lines formed in the wavelength range from 1.8 A to 20 A, observed with the Soft X-ray Polychromator of the Solar Maximum Mission (SMM), shows that solar flare plasmas are characterized by non-thermal velocities. Flare plasmas in general consist of two components at different temperatures: 5–8 106 K and 16–25 106 K, respectively. The non-thermal mass motions observed in the hotter component are affected by higher velocities and they depend on temperature in a way which is varying with the flare phase. The results obtained for flare plasmas are consistent with the functional relationship between temperature and non-thermal velocity derived for the lower temperature regimes existing in the upper chromosphere, in the transition region and in the non-flaring corona. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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