CH Cygni in 1983-84 - Transition to a real symbiotic star?

Details CH Cygni in 1983-84 - Transition to a real symbiotic star? CH Cygni in 1983-84 - Transition to a real symbiotic star?

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..330w&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, March 1986, p. 330-333.

Astronomy and Astrophysics

Astronomy

7

Stellar Envelopes, Stellar Spectra, Symbiotic Stars, Absorption Spectra, Radial Velocity, Stellar Activity, Strontium

Scientific paper

The authors report the end of the shell spectrum phase of CH Cyg and its transformation into a symbiotic star. A Reticon spectrum of moderate dispersion showing forbidden and permitted emission lines as well as strong absorption by Ca I and Al I is displayed. The absence of Sr II absorption in the shell during prior years may be explained by ionization from the first excited state by Lα photons. Sr II absorption gradually reappeared in 1983 - 84.

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