Mapping stellar surfaces from spectra of medium resolution
Abstract
The use of spectra with resolutions of 6, 9, 12, and 15 km/s to produce maps of abundance inhomogeneities on the surfaces of stars is studied. It is assumed that the spectra have a high SNR, are free from blends, and that the inclination of the axis of rotation and the locations of surface features are favorable. Numerical studies of the Fe II 4923 A line showed that, for v sin i greater than about 30 km/s, good maps of surface features can be expected from spectra with resolutions of 6 km/s or better.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 1990
- Bibcode:
- 1990A&A...233..497P
- Keywords:
-
- Astronomical Maps;
- Doppler Effect;
- Magnetic Stars;
- Peculiar Stars;
- Stellar Spectra;
- Iron;
- Line Spectra;
- Spectral Resolution;
- Stellar Magnetic Fields;
- Astronomy