An extended superhot solar flare X-ray source

Details An extended superhot solar flare X-ray source An extended superhot solar flare X-ray source

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....4...50h&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 4 p 50-53 (SEE N85-34729 23-92)

Physics

2

Solar Flares, Solar Limb, X Ray Sources, Cooling, Coronal Loops, Solar Maximum Mission, Temperature, X Ray Imagery, X Ray Spectra

Scientific paper

A superhot hard X-ray source in a solar flare occulted by the solar limb was identified. Its hard X-ray image was found to show great horizontal extent but little vertical extent. An H alpha brightening at the same limb position about an hour later suggests a multi-component loop prominence system, so that it appears that a superhot source can evolve in the same manner as a normal solar soft X-ray source. The assignment of plausiable values to physical parameters in the source suggests (from the simplest form of classical thermal-conduction theory) that either new physics will be required to suppress conduction, or else that gradual energy release well after the impulsive phase of the flare must occur. In this respect too, the superhot source appears to resemble ordinary soft X-ray sources, except of course that its temperature is higher.

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