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Stellar coronae—Evidence for their existence from X- and UV observations

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Abstract

Stellar coronae were among the first predicted X-ray sources. Because of their relatively low X-ray luminosities, however, they have been discovered only during the last few years.

In the present paper the current state of stellar coronal X- and UV observations has been reviewed, including some preliminary observational results from the HEAO-1 and IUE satellites, but still without any result from the recently launched X-ray satellite HEAO-2.

Late 1978 about two dozens of stellar soft X-ray sources have been detected, e.g., normal stars like the Sun (e.g., α Cen), very active stars (RS CVn systems), and possibly a corona around an intermediately hot white dwarf (Sirius B).

The observational results of various objects have been discussed and compared with X-ray luminosity predictions based on minimum-flux coronal models.

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Mewe, R. Stellar coronae—Evidence for their existence from X- and UV observations. Space Sci Rev 24, 101–144 (1979). https://doi.org/10.1007/BF00221844

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