Time structure and energy spectrum evolution of the solar flare x-rays measured by the «IRIS» spectrometer on board the «Coronas-f» spacecraft

Dmitriyev P.B.; Koudriavtsev I.V.; Lazutkov V.P.; Matveev G.A.; Savchenko M.I.; Skorodumov D.V.; Дмитриев П.Б.; Кудрявцев И.В.; Лазутков В.П.; Матвеев Г.А.; Савченко М.И.; Скородумов Д.В.

Scientific articles \ Mathematics. Natural sciences \ Astronomy. Astrophysics. Space research. Geodesy \ The Solar System

Time structure and energy spectrum evolution of the solar flare x-rays measured by the «IRIS» spectrometer on board the «Coronas-f» spacecraft

Dmitriyev P.B. Koudriavtsev I.V. Lazutkov V.P. Matveev G.A. Savchenko M.I. Skorodumov D.V.

Journal: Солнечно-земная физика @solnechno-zemnaya-fizika

Section: Физика солнца

Article in issue: 12 т.1, 2008.

Free access

The time structure and energy spectrum evolution of the X-ray emission of solar flares observed by spectrometer IRIS aboard the CORONAS-F spacecraft are investigated. It was found that the quasi-periodic oscillations from 10 to 30 s arise in the soft X-ray flare emission, while they are absent in the pre-flare one. The variation in the energetic spectrum of the hard X-ray emission of C-class flares was shown to depend on the distribution function of accelerated electrons.