Ultraviolet spectra of dwarf solar neighbourhood stars. I.
Abstract
Short-wavelength IUE spectra of three nearby M-type dwarfs are presented. Two of these stars, Gliese 867 A and AU Mic, are active UV Ceti flare stars and their UV spectra exhibit strong emission lines, characteristic of active chromospheres. The third star, Gliese 825, is a low-activity flare star and its spectrum reveals no chromospheric lines. A strong UV continuum exists in one of the spectra of Gliese 867 A and it is deduced that a flare took place during the exposure. A spectrum of the flare light is extracted and compared with the predictions of various flare models.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- December 1981
- DOI:
- 10.1093/mnras/197.3.815
- Bibcode:
- 1981MNRAS.197..815B
- Keywords:
-
- Chromosphere;
- Dwarf Stars;
- Flare Stars;
- Iue;
- Stellar Spectra;
- Ultraviolet Spectra;
- Emission Spectra;
- Line Spectra;
- M Stars;
- Spectrum Analysis;
- Stellar Flares;
- Stellar Models;
- Astronomy