Spatial structure and temporal development of a solar X-ray flare observed from SKYLAB on June 15, 1973

Details Spatial structure and temporal development of a solar X-ray flare observed from SKYLAB on June 15, 1973 Spatial structure and temporal development of a solar X-ray flare observed from SKYLAB on June 15, 1973

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...45..411p&link_type=abstract

Solar Physics, vol. 45, Dec. 1975, p. 411-433. Research supported by the Consiglio Nazionale delle Ricerche;

Astronomy and Astrophysics

Astronomy

51

Skylab Program, Solar Flares, Solar X-Rays, X Ray Astronomy, Grazing Incidence Telescopes, Manned Orbital Telescopes, Spaceborne Astronomy, X Ray Telescopes

Scientific paper

Morphological and quantitative analyses are presented of a 1B solar flare that was observed with high spatial and temporal resolution by the S-054 grazing-incidence X-ray telescope aboard Skylab. It is found that the flare had the configuration of a compact region with a characteristic size of the order of 30 arcsec at the intensity peak, the interior of the region appeared to be highly structured and to consist of temporally changing complex loop systems, brightening over an extended part of the active region preceded the flare onset, and the impulsive phase was marked by rapid brightening in the loop structures. The X-ray photographs also indicate that the X-ray emission was centered over the neutral line of the longitudinal magnetic field, loop systems formed at successively increasing heights during the decay phase, and different regions of the flare had distinctly different light curves. The flux profiles for the different regions are shown to suggest continued heating during the decay phase. It is concluded that flare models should be based on a multiplicity of volumes ordered in loops of successively larger scale lengths and heights rather than on a single point of energy release and deposition.

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