Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981sval....7..238i&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 7, July 1981, p. 432-436.) Soviet Astronomy Letters, vol. 7, July-Aug. 1981, p. 238-241
Astronomy and Astrophysics
Astronomy
3
Astronomical Photometry, Infrared Astronomy, Late Stars, Red Giant Stars, Stellar Spectrophotometry, Forbidden Transitions, H Alpha Line, H Beta Line, Hot Stars, Infrared Photometry, Line Spectra
Scientific paper
Concurrent spectrometry is presented of V 1016 Cyg in the 3300-7500 A region and J, H, K, N infrared photometry during September 1980. The H-alpha/H-beta ratio is about twice as great as it was in the mid-1970s, and the H-beta flux is increased by a factor of about 1.4, while the intensity of 4959, 5007 A forbidden lines O III and 3869 A forbidden lines Ne III relative to H-beta has dropped. The forbidden lines have varied no more than 20% in absolute intensity, and there have been no appreciable changes in the optical continuum level. It is concluded that the object V 1016 Cyg belongs to the class of symbiotic stars.
Ipatov A. P.
Yudin Boris F.
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