Temporal variations of loop structures in the solar atmosphere

Details Temporal variations of loop structures in the solar atmosphere Temporal variations of loop structures in the solar atmosphere

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980soph...66...79s&link_type=abstract

Solar Physics, vol. 66, May 1980, p. 79-87.

Physics

43

Loops, Periodic Variations, Solar Atmosphere, Solar Corona, Spectroheliographs, Ultraviolet Spectra, Atmospheric Heating, Satellite-Borne Instruments, Skylab Program, Solar Spectra, Spectrum Analysis

Scientific paper

The temporal characteristics of coronal loops are described using a number of unique time-lapse sequences of Ne VII 465 A, Mg IX 368 A, and Fe XV 284 A spectroheliograms. These sequences were obtained with the NRL Skylab/ATM slitless spectrograph during the final Skylab mission (November 1973-February 1974). In the first sequence, Ne VII and Mg IX images were obtained simultaneously at 1.5-mm intervals for a 27-min duration on Nov. 28, 1973. In the second sequence, simultaneous Ne VII-Mg IX pairs were obtained at approximately 3-hr intervals (on alternate satellite orbits) for a 36-hr duration on Jan. 19-20, 1974. The intervening orbits were used to obtain a third sequence which consisted of Fe XV images at 3-hr intervals for the same 36-hr duration. The results place severe constraints on theoretical models of coronal heating and mass flow.

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