The Spectrum of CH Cygni from 1961 to 1973
Abstract
Radial velocities of absorption lines from 30 spectrograms taken between 1964 and 1973 yield no evidence of orbital motion. Evidence is presented that a circumstellar envelope is always present and that an "outburst" occurs when the envelope is excited by a disturbed region on the surface of the star. Some comparisons are made of CH Cyg with the VV Cephei stars, symbiotic objects, and the symbiotic long-period variable H Aqr. Key words: radial velocities - spectrum variable - symbiotic star - circumstellar matter
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- June 1974
- DOI:
- 10.1086/129592
- Bibcode:
- 1974PASP...86..233D