Symbiotic star BF Cygni from 1965 to 1970.
Abstract
Symbiotic Star BF Cygni from 1965 to 1970 Summary. Sixteen spectra of the symbiotic star BF Cygni covering the period 1965-1970 are investigated. Variations of the line intensities, the Balmer decrements, the color and electronic temperatures are given. Approximate values of the electron density are deduced in order to derive an order of magnitude for the sizes of the emitting regions of BF Cygni. A crude stratification and evolution model is proposed. Key words: Symbiotic stars - planetary nebulae - stellar evolution
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1973
- Bibcode:
- 1973A&A....23..363M