Computer Science – Sound
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13...27h&link_type=abstract
Advances in Space Research, Volume 13, Issue 9, p. 27-30.
Computer Science
Sound
4
Scientific paper
X-ray imaging from Skylab and various sounding rockets has established the existence of and begun the characterization of coronal X-ray bright points (XBPs). With the launch of Yohkoh, the Soft X-ray Telescope (SXT) provides a new opportunity to observe these small-scale structures with higher temporal resolution, improved dynamic range, and greater sensitivity. We present the results from the analysis of SXT full-disk images showing the location and detailed evolution of XBPs. We derive correlations of XBPs with magnetic bipoles, He I 10830-Å dark points, and other coronal features. From the evolution of 518 XBPs presented in this initial study, we derive a mean lifetime of about 12 hours, with some XBPs lasting as long as 5 days and others less than 10 minutes. A comprehensive study of the relationship between XBP lifetime, X-ray output, size, location, and variability may well lead to a re-evaluation of the nature and definition of XBPs.
Harvey Karen L.
Nitta Nariaki
Strong Keith Temple
Tsuneta Saku
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