Photoelectric K-line indices for 165 B, A, and F stars.
Abstract
Photoelectric observations of the intensity of the Ca ii K line have been carried out for 165 B, A, and F stars with the use of an echelle-grating spectrometer. Two different K-line indices were determined, for 100 and 108 stars, based on the use of slit widths of 4.3 A and 7.8 A, respectively. The metallic-line A stars were found to belong to an extended group of stars with relatively narrow K lines. Key words: K-line intensity - early-type stars - Am stars
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- December 1978
- Bibcode:
- 1978A&AS...34..441P
- Keywords:
-
- Early-Type Stars:Spectral Lines;
- Metallic-Line Stars:Spectral Lines