Comparison of H-alpha absorbing features with soft X-ray images at the onset of solar flares

Details Comparison of H-alpha absorbing features with soft X-ray images at the onset of solar flares Comparison of H-alpha absorbing features with soft X-ray images at the onset of solar flares

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...224..267m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 224, no. 1-2, Oct. 1989, p. 267-283.

Astronomy and Astrophysics

Astrophysics

4

H Alpha Line, Solar Flares, Solar X-Rays, X Ray Imagery, X Ray Spectroscopy, Solar Maximum Mission, Solar Radio Emission

Scientific paper

Data from the Hard X-ray Imaging Spectrometer on the Solar Maximum Mission and photographs made by a three-wavelength heliograph are used to study three flares which occurred on October 19, 1980. It is found that the active region included closed magnetic field loops, or flaring arches, that contained the flares. It is shown that a number of separate arches were involved and that only a few of these arches became hot enough to emit X-rays. The loops that contain most of the released energy heat any ablated chromospheric material to X-ray emitting temperatures.

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