X-ray bright surges

Autor: František Fárník, Zdeněk Švestka, Frances Tang
Rok vydání: 1990
Předmět:
Zdroj: Solar Physics. 127:149-163
ISSN: 1573-093X
0038-0938
DOI: 10.1007/bf00158520
Popis: We present evidence of X-ray emission from surges that are bright in Hα. These surges have many features common to flaring arches of Martin and Svestka (1988); the basic difference between the two is that in flaring arches cold and hot plasma are injected into clearly defined closed magnetic loops, while in the surges the injection goes into large-scale magnetic field structures of which the second footpoint is usually unknown. Because of the steep density gradient in such large-scale structures, the X-ray visibility of bright surges is limited to a few tens of seconds only. A series of repetitive surges, some of them bright and emitting X-rays, occurred on 8 July, 1980 from footpoints of two large-scale coronal structures, which might have been the legs of an enormous arch at least 600 Mm long.
Databáze: OpenAIRE
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