Spectroscopic Observations of Barnard's Variable in Messier 3.
Abstract
The velocity-curve of Barnard's variable star in the globular cluster M3 has been derived from 15 spectrograms. The normal velocity is - 152.8 km/sec; the range, 56 km/sec. The spectral type varies from F6 to G3. Emission lines of hydrogen occur during the increase in light but show no variation in position with period. The spectral changes resemble those of the peculiar variable W Virginis
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1940
- DOI:
- 10.1086/144228
- Bibcode:
- 1940ApJ....92..396J