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Coronal astronomy is by now a fairly mature discipline, with a quarter century having gone by since the detection of the first
stellar X-ray coronal source (Capella), and having benefitted from a series of major orbiting observing facilities. Serveral
observational characteristics of coronal X-ray and EUV emission have been solidly established through extensive observations,
and are by now common, almost text-book, knowledge. At the same time the implications of coronal astronomy for broader astrophysical
questions (e.g.Galactic structure, stellar formation, stellar structure, etc.) have become appreciated. The interpretation
of stellar coronal properties is however still often open to debate, and will need qualitatively new observational data to
book further progress. In the present review we try to recapitulate our view on the status of the field at the beginning of
a new era, in which the high sensitivity and the high spectral resolution provided by Chandra and SMM-Newton will address
new questions which were not accessible before.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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