Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...229..104b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 229, no. 1, March 1990, p. 104-116.
Astronomy and Astrophysics
Astrophysics
14
Binary Stars, Novae, Stellar Spectra, Symbiotic Stars, Emission Spectra, M Stars, Stellar Atmospheres, Stellar Luminosity, Stellar Spectrophotometry, Wolf-Rayet Stars
Scientific paper
Results are presented of a complete analysis of the first spectroscopic observations of the symbiotic nova HBV 475 (= V1329 Cyg) obtained with the 183-cm reflector of the Dominion Astrophysical Observatory in October-December 1969. Data show the presence of three main line systems: (1) narrow lines with a wide ionization range, up to doubly ionized CNO, showing a velocity gradient; (2) a broad line system which includes the strongest emission lines of H, He II, forbidden Ne III line and forbidden O III line, which displays a complex structure with up to 10 individual components; and (3) a WR-type line system which includes broad and shallow emissions corresponding to those observed in WN5 stars, with a velocity expansion of 2300 km/sec. A binary model of HBV 475 is developed, in which the narrow lines are formed in different regions of the cool giant's wind ionized by the radiation of the hot star.
Baratta Giovanni Battista
Viotti Roberto
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