Solar X-ray flares observed with the Columbia University instrument on OSO-8

Details Solar X-ray flares observed with the Columbia University instrument on OSO-8 Solar X-ray flares observed with the Columbia University instrument on OSO-8

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978cosp.meets....p&link_type=abstract

COSPAR, Plenary Meeting, 21st, Innsbruck, Austria, May 29-June 10, 1978, Paper. 7 p.

Astronomy and Astrophysics

Astronomy

Satellite Observation, Solar Flares, Solar X-Rays, X Ray Spectroscopy, Line Spectra, Oso-8, Satellite-Borne Instruments, Spaceborne Astronomy, Temperature Effects

Scientific paper

Observations of solar X-ray flares with a graphite-crystal spectrometer aboard the OSO 8 satellite are discussed. The development of the temperature and emission measure of a typical subflare is examined, and the temperature dependence of three Si satellite line systems is derived. Possible electron densities in the range between 10 to the 13th power and 10 to the 14th power per cu cm are determined from the intensities of He-like lines. The results indicate that it is always possible to fit a single-temperature model during all phases of flares and suggest that the energy in a coronal soft X-ray event is injected on time scales of minutes rather than instantaneously.

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