IUE MG II doublet observations in F and G main sequence stars.
Abstract
Mg II resonance lines at 2800 A were studied in the spectra of F and G main sequence stars, observed with the IUE satellite in high resolution mode. Correlation with other chromospheric indicators were investigated and a search was conducted for the best candidates to continue further studies of differential rotation. An attempt has been made to see whether there is a unique relation between the logarithm of the Mg II k emission line width and the absolute visual magnitude, independent of luminosity and emission strengths, as derived for the Ca II K emission line.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1981
- Bibcode:
- 1981A&A....96...17G
- Keywords:
-
- Chromosphere;
- Dwarf Stars;
- F Stars;
- G Stars;
- Iue;
- Magnesium;
- Main Sequence Stars;
- Stellar Spectra;
- Emission Spectra;
- Resonance Lines;
- Stellar Luminosity;
- Stellar Magnitude;
- Stellar Rotation;
- Astrophysics