Possible detection of Lyman alpha emission in the A7 III star gamma Bootis
Abstract
We analyze the archive high dispersion IUE spectrum SWP 10885 of Gamma Boo (A7 III) in the Ly-alpha region, using our own software. A faint stellar emission overlayed by a saturated interstellar absorption is detected. This result and the previous detection of Ly-alpha emission in Altair and Alpha Cep do suggest that the presence of chromospheric emission is a common characteristic of main sequence and giant stars of spectral type A7.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 1992
- Bibcode:
- 1992A&A...265..643M
- Keywords:
-
- A Stars;
- Emission Spectra;
- Lyman Alpha Radiation;
- Stellar Spectra;
- Iue;
- Stellar Atmospheres;
- Stellar Coronas;
- Ultraviolet Spectra;
- Astrophysics