Analysis of Balmer Series Emission in the Solar Flare SOL2017-04-21

Kupryakov, Y.A.; Maliutin, V.A.; Bychkov, K.V.; Gorshkov, A.B.; Belova, O.M.

Авторы: Kupryakov Yu A., Maliutin V.A., Bychkov K.V., Gorshkov A.B., Belova O.M.
Журнал: Moscow University Physics Bulletin
Том: 80
Номер: 3
Год издания: 2025
Издательство: Allerton Press
Местоположение издательства: New York, N.Y., United States
Первая страница: 613
Последняя страница: 618
DOI: 10.3103/S0027134925700705
Аннотация: We observed a B6.2-class solar flare in active region NOAA 12651 using the HSFA spec-trograph at the Ond ˇrejov Observatory in hydrogen spectral lines. After processing the spectra, theintegral emission fluxes in the Hα, Hβ, and Hε lines were determined. Within the heated-gas approach,a theoretical reconstruction of the plasma parameters was performed, taking into account the physicalconditions in the chromosphere, including self-absorption in the spectral lines. Treating the observedfluxes requires the assumption of inhomogeneous gas. Agreement between the theoretical and observedfluxes is achieved in a model involving the superposition of two gas layers. Behind lies a dense gaswith concentration N ranging from 3 × 10^12 to 3 × 10^13 cm−3, and between it and the observer is ararefied layer where N = (3−6) × 10^10 cm−3. The layer thickness is in the range from 600 to 3000 km,the temperature—between 4000 and 7200 K, and the turbulent velocity—from 0 to 90 km/s. Thepresence of dense regions indicates that the source of the observed emission originates from the middlechromosphere, not higher than 1000 km.
Добавил в систему: Купряков Юрий Алексеевич

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ПсковГУ
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ПсковГУ

Analysis of Balmer Series Emission in the Solar Flare SOL2017-04-21статья

Прикрепленные файлы