Simultaneous rapid X-ray and optical intensity fluctuations from a small part of a flaring active region

Details Simultaneous rapid X-ray and optical intensity fluctuations from a small part of a flaring active region Simultaneous rapid X-ray and optical intensity fluctuations from a small part of a flaring active region

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...224..284s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 224, no. 1-2, Oct. 1989, p. 284-289.

Physics

6

Solar Activity, Solar Flares, Solar Physics, Solar X-Rays, Bursts, H Alpha Line, Imaging Spectrometers, Ion Beams, Solar Spectra

Scientific paper

Observations of three short-lived solar soft X-ray spikes which occurred within a flaring active region on October 19, 1980, are presented. The events took place at a site remote from flare activity, which was in abeyance. The most intense spike was accompanied by emissions in the wings of H-alpha and extended to X-ray energies above 34 keV. A possible interpretation which is consistent with the spectral evolution of the X-ray bursts and the relative timing of the H-alpha broadening with respect to the latter is that the energy was transferred from elsewhere in the active region by a neutral ion beam.

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