Spectral observations of CH Cyg. III - The shell absorption spectrum during 1981-1982

Details Spectral observations of CH Cyg. III - The shell absorption spectrum during 1981-1982 Spectral observations of CH Cyg. III - The shell absorption spectrum during 1981-1982

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987kfnt....3...21r&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 3, Jan.-Feb. 1987, p. 21-24. In Russian.

Computer Science

Absorption Spectra, Stellar Activity, Stellar Envelopes, Stellar Spectra, Cygnus Constellation, Metallicity, Spectral Line Width, Stellar Atmospheres

Scientific paper

The absorption line spectrum that appeared in CH Cyg in 1979 is described. Parameters of the region of the shell in which the spectrum is formed are obtained from an analysis of spectral data obtained during 1981-1982. These parameters include the excitation temperature, the microturbulence velocity, the electron density, and the effective width of the spectral formation region. A comparison with the atmospheres of normal stars shows that the conditions in this region correspond to the atmosphere of a B9-A1 Ia supergiant.

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