Chromospheric emission lines in the red spectrum of AD Leonis. II. Physical conditions in flares.
Abstract
Simultaneous photometry and time-resolved spectra of the dMe flare star AD Leo has been used to deduce flare temperatures, electron densities, and dimensions. Photometric results for two qualitatively different flares yield estimates of the differences in physical properties between these flares. Flares on AD Leo are hotter and denser than their solar counterparts, and spike-like flares occupy smaller volumes than longer-lived flares. An upper limit to the flare X-ray luminosity is set atL <4 x l028ergss-1. Subject headings: stars: chromospheres - stars: emission-line - stars: flare - stars: individual
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1979
- DOI:
- 10.1086/157173
- Bibcode:
- 1979ApJ...231..148S
- Keywords:
-
- Chromosphere;
- Emission Spectra;
- Flare Stars;
- Infrared Spectra;
- Stellar Spectrophotometry;
- Variable Stars;
- Graphs (Charts);
- H Alpha Line;
- Helium;
- Spectral Resolution;
- Stellar Luminosity;
- Stellar Models;
- Astrophysics;
- Flare Stars:Photometry;
- Flare Stars:Spectra