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EUVE Observations of AR Lacertae: The Differential Emission Measure and Evidence for Extended Prominences
Published online by Cambridge University Press: 12 April 2016
Abstract
EUVE observed the eclipsing RS CVn system AR Lac in October 1993. The differential emission measure shows a double-peaked structure similar to the two-temperature distribution seen in X-rays. The best-fit Fe abundance is 0.4 solar. The DS light curve shows a deep primary eclipse. The slow egress from eclipse may be due the presence of spatially extended, optically-thick “prominences” in the equatorial plane of the K star.
- Type
- III. Coronae of Cool Stars
- Information
- International Astronomical Union Colloquium , Volume 152: Astrophysics in the Extreme Ultraviolet , 1996 , pp. 129 - 133
- Copyright
- Copyright © Kluwer 1996