High Time Resolution Observations of Solar Hα Flares

Details High Time Resolution Observations of Solar Hα Flares High Time Resolution Observations of Solar Hα Flares

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..801..412r&link_type=abstract

ASTROPHYSICAL SOURCES OF HIGH ENERGY PARTICLES AND RADIATION. AIP Conference Proceedings, Volume 801, pp. 412-414 (2005).

Astronomy and Astrophysics

Astrophysics

Solar Flares, Solar Radiation, X-Ray Sources (Astronomical), Solar Electromagnetic Emission, X-Ray

Scientific paper

We present the first results of a search for fast changes of solar flare Hα emission correlated in time with variations of hard X-ray fluxes. For numerous flares we have found good time correlations between short variations of the Hα emission of selected bright flaring kernels and the variations of the X-ray flux; some subtle variations of both light curves are simultaneous to a fraction of second. Our results are consistent with a model of a highly spatially and temporally fragmented primary flare energy source as well as with theoretical predictions of very short cooling time of the chromospheric material.

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