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H-alpha spectra of dynamic chromospheric processes in five well-observed X-ray flares
- Source :
- The Astrophysical Journal. 363:318
- Publication Year :
- 1990
- Publisher :
- American Astronomical Society, 1990.
-
Abstract
- Simultaneous H-alpha and hard X-ray (HXR) spectra were obtained for five solar flares to determine the relationship of H-alpha profiles and the nonthermal part of the flare represented by the hard X-ray burst. All five flares exhibited impulsive-phase redshifted H-alpha in emission, which was temporarily and spatially associated with intense HXR emission and broad impulsive-phase H-alpha wings. A few small regions within two flares showed a blueshifted H-alpha emission which appeared only early in the impulsive phase and was temporally correlated with the HXR emission but not with broad H-alpha wings. Finally, there were both redshifted and blueshifted absorption spectra with properties fully consistent with those known for erupting and untwisting filaments.
- Subjects :
- Physics
Solar flare
Astrophysics::High Energy Astrophysical Phenomena
Astronomy
Balmer series
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Redshift
Spectral line
law.invention
symbols.namesake
Space and Planetary Science
law
Physics::Space Physics
symbols
Astrophysics::Solar and Stellar Astrophysics
H-alpha
Emission spectrum
Chromosphere
Astrophysics::Galaxy Astrophysics
Flare
Subjects
Details
- ISSN :
- 15384357 and 0004637X
- Volume :
- 363
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi...........325fade1d0fb738dbfe24e9f7bc22b6d