Near-infrared spectral classification of symbiotic stars

Details Near-infrared spectral classification of symbiotic stars Near-infrared spectral classification of symbiotic stars

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...189...97s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 189, no. 1-2, Jan. 1988, p. 97-108. DFG-supported research.

Astronomy and Astrophysics

Astrophysics

38

Giant Stars, Infrared Spectra, Late Stars, Near Infrared Radiation, Spectrum Analysis, Symbiotic Stars, Cool Stars, G Stars, K Stars, M Stars, Spectral Line Width, Stellar Spectra

Scientific paper

Near-infrared spectra of 16 symbiotic stars and 29 G, K and M standard stars are presented. The spectrograms are used to classify the cool components in symbiotic stars. The equivalent width of the CN band feature at (7916+7941) Å is demonstrated to be a quantitative luminosity indicator for classes III to I in the (single) M0 to M3 standard stars. Six of the observed symbiotic stars have temperature classes within this range and the criterium is applied to their spectrograms. Accordingly, four of the late-type components are normal giants, while the nature of two systems remains ambiguous. The results are discussed in the light of presently proposed interacting binary models for symbiotic stars.

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