Falchi, A. (2002) Dynamics of the chromospheric flares. Il nuovo cimento C, 25 (5\6). pp. 639-646. ISSN 1826-9885
|
Text
ncc8839.pdf - Published Version Download (106kB) | Preview |
Abstract
In this paper, I describe how chromospheric observations of a flare are used to locate the footpoints of the flaring loops and to analyse the response to the energy release during a flare. In particular, a red asymmetry in chromospheric lines is often observed during the impulsive phase of flares and is explained as due to Doppler-shifted emission of downward-moving chromospheric plasma. Using flare dynamic models that simulate in detail the physical conditions within the chromosphere, observables such as the response time, the duration and the peak value of the downflow velocity can yield information on the flare energetics. Moreover, this downward velocity is a chromospheric signature present in major events as well as in micro-flares, and seems to be a very distinctive characteristics of the flare process, more than the increasing intensity itself.
| Item Type: | Article |
|---|---|
| Additional Information: | Paper presented at the International Meeting on THEMIS and the New Frontiers of Solar Atmosphere Dynamics, Rome, Italy, March 19-21, 2001. |
| Uncontrolled Keywords: | Solar physics ; Chromosphere and chromosphere-corona transition; spicules ; Flares, bursts, and related phenomena ; Conference proceedings |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 12 Mar 2020 16:52 |
| Last Modified: | 12 Mar 2020 16:52 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/14857 |
Actions (login required)
 |
View Item |
