Spectral observations of AG DRA in 1983

Details Spectral observations of AG DRA in 1983 Spectral observations of AG DRA in 1983

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986afz....25..447i&link_type=abstract

(Astrofizika, vol. 25, Nov.-Dec. 1986, p. 447-452) Astrophysics (ISSN 0571-7132), vol. 25, no. 3, May 1987, p. 612-615. Translat

Astronomy and Astrophysics

Astrophysics

1

Stellar Spectra, Symbiotic Stars, Balmer Series, Helium, Hydrogen, Novae, Spectral Energy Distribution, Spectral Line Width

Scientific paper

The results (from 40 spectrograms obtained in 1983) of spectral observations with reciprocal dispersions 86 A/mm and also 94 A/mm at H-gamma are given. It is noted that the equivalent widths of the emission lines of hydrogen and He II are variable. The Balmer decrement is found with allowance for the energy distribution in the AG Dra spectrum as constructed from literature data, interstellar absorption being taken into account as well. It is concluded that in the framework of the symbiotic model AG Dra is a pair consisting of a K3 III star and a hot component with dense and compact envelope.

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