On the role of preflares in tornado-type prominences

Авторы: Kupryakov Yu A., Kotrc P., Kashapova L.K.
Журнал: Astronomical and Astrophysical Transactions
Номер: Vol. 31, Issue 2
Год издания: 2019
Издательство: Cambridge Scientific Publishers
Местоположение издательства: Cambridge
Первая страница: 177
Последняя страница: 182
DOI: 10.17184/eac.9781908106698
Аннотация: We present first results of a study of rotation parameters of the tornado-type promi- nences using H-alpha line spectra and filtergrams. The prominences of the tornado-type were observed by ground-based spectrographs MFS and HSFA 2 in the Ondrejov Ob- servatory (Astronomical Institute of AS CR) from 2000 to 2017. The analysis took into account the structure and dynamics of selected prominences and a comparison of the data of H-alpha with the EUV observations of SDO (304 A, 193 A, 171 A), as well as information about the emission of ares in the X-ray range. We found that most of the analyzed events were associated with solar ares of classes from B5 to M5 by GOES classification. We revealed two types of motions in the prominences. The first type shows the Doppler velocity quasi-symmetry of the values in the "blue" and "red" H-alpha line wings. The events of the other type demonstrate a difference of up to one order of velocities in the direction of, and towards, the observer.
Добавил в систему: Купряков Юрий Алексеевич

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