Stellar Coronal Structures

Details Stellar Coronal Structures Stellar Coronal Structures

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000exun.conf..251s&link_type=abstract

EXPLORING THE UNIVERSE A Festschrift in Honor of R Giacconi . Held October 1997 in Rome, Italy. Edited by H Gursky (Naval Resear

Astronomy and Astrophysics

Astronomy

Scientific paper

The discovery of X-ray emission from normal stars throughout most of the HR diagram was among the momentous findings of the Einstein Observatory. The mechanism responsible for X-ray activity in late type stars is believed to be essentially similar to the one operating in the Sun, i.e. dissipation of magnetic energy in an optically thin corona. Coronal magnetic fields should thus induce structuring of the coronal plasma in loop-like structures, as observed in the Sun. I shall discuss on the structure of stellar coronae, essentially along the lines of a program initiated by the late G.S. Vaiana after the early observations of the solar corona by Skylab, and continued in Palermo. I shall show how spectrally resolved X-ray observations can evidence the existence of stellar coronal loops, both in the static case and during flares.

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