UV flares on II Peg
Abstract
Observations by IUE of the RS CVn star II Peg in the upper chromospheric and transition regions lines Mg II k, C IV, and He II in Feb. 1983 show evidence for flare activity. The electron pressure derived from the mean of two different line ratios produces good agreement between the allowed and intersystem lines in the differential emission measure curves. The total radiative losses from the chromosphere and transition region for the first flare on Feb. 2 is 2.46 times 10 to the 35th power erg, and at least 1.91 times 10 to the 34th power erg, for the flare on Feb. 4.
- Publication:
-
ESA Special Publication
- Pub Date:
- June 1988
- Bibcode:
- 1988ESASP.281a.307D
- Keywords:
-
- Iue;
- Spaceborne Astronomy;
- Stellar Flares;
- Ultraviolet Astronomy;
- Ultraviolet Spectra;
- Electron Pressure;
- Spectral Emission;
- Stellar Radiation;
- Astronomy