Photometry of rapidly evolving chromospheric bright points in NOAA 9661 as observed by THEMIS and the Ondrejov Multichannel Flare Spectrograph

Авторы: Kotrc P., Kupryakov Yu A., Chambe G., J-M Malherbe
Сборник: Proc. 10th. European Solar Physics Meeting, "Solar Variability: From Core to Outer Frontiers"
Серия: ESA SP-506
Том: 506
Год издания: 2002
Место издания: Prague, Czech Republic
Первая страница: 669
Последняя страница: 672
DOI: ISBN: 92-9092-816-6
Аннотация: Active region NOAA 9661 was observed on 13 October 2001 via narrow band Hα filters at THEMIS and at the Ondřejov Multichannel Flare Spectrograph both at a cadence of 25 images per second. Rapidly evolving bright points located at various places close to the sunspot were noticed several times during the day from 6 UT until 13 UT. Quite often their sudden appearance and disappearance seemed to be strongly correlated. We expect these small areas to be magnetically interconnected and possibly heated by injections of the same population of electrons moving along the magnetic field lines. Light curves of Hα emission integrated over individual bright areas were derived to search for short-timescale variations and to analyze them, especially concerning their correlations between different pairs of these areas. A similar analysis was performed for sites in all the active region for comparison and calibration purposes. Changes in correlations are discussed.
Добавил в систему: Купряков Юрий Алексеевич

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