Morphology and physical parameters of a solar flare

Details Morphology and physical parameters of a solar flare Morphology and physical parameters of a solar flare

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...216l..79s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 216, Sept. 1, 1977, p. L79-L82.

Astronomy and Astrophysics

Astrophysics

6

Chromosphere, H Alpha Line, Solar Corona, Solar Flares, Solar X-Rays, High Resolution, Magnetic Measurement, Noaa Satellites, Satellite Observation, Skylab Program, Solar Activity Effects

Scientific paper

The chromospheric and coronal morphology of the flare of June 15, 1973, (1B/M3) in NOAA active region 131 (McMath 12379) is discussed, and results of quantitative analysis of Skylab soft X-ray observations of the event are presented. H-alpha and white-light observations reveal evidence of emerging flux near the site of the H-alpha flare onset. Preflare and early flare filament activity and its spatial and temporal correlation with the flare are discussed. Spatially resolved soft X-rays are compared with H-alpha and magnetic-field measurements. Full-disk high-temporal-resolution soft X-ray flux measurements and time profiles of the resultant temperature and density calculations are also presented which yield a peak temperature of about 14.2 million K and a peak electron density of approximately 3.5 deg 10 to the -10th power per cu cm and show a preflash-phase temperature rise to about 9 million K. The peak values should be compared with the respective values of approximately 25 million K and 4.5 by 10 to the -10th power per cu cm deduced from the spatially resolved data.

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