Electronic Resource
Springer
Solar physics
66 (1980), S. 371-391
ISSN:
1573-093X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract A long decay X-ray event (LDE) which appeared as an expanding loop system on the solar limb on 13–14 August 1973 was well observed temporally (with Skylab ATM S056 and S054 X-ray telescopes) and spectrally (with S082A XUV spectroheliograph). We summarize and supplement the extensive discussion in the literature. In addition, a one-dimensional hydrodynamic study is undertaken to investigate both increasing and decreasing phases of the event. Results indicate that the inferred temperature gradients along the loops during the heating phase are consistent with unrestricted dynamic and conductive flows along magnetic field lines. Furthermore, we conclude that it cannot be unequivocally stated that enhanced emission at the tops of loops is due to pressure gradients along the field lines. Finally, the large emission measure variations in the 105–106 K plasma during the event's decline may be due simply to the temperature dependence of radiative decay within a multi-loop configuration.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00150592
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