Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...126...59n&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 126, no. 1, Sept. 1983, p. 59-69 . Research supported by the Swiss National Sc
Astronomy and Astrophysics
Astronomy
28
Planetary Nebulae, Stellar Spectra, Symbiotic Stars, Ultraviolet Astronomy, Ultraviolet Spectra, Continuous Spectra, Electron Energy, Far Ultraviolet Radiation, Iue, Line Spectra, Stellar Envelopes
Scientific paper
Evidence is presented for the binary nature of the symbiotic star HBV 475 ( = V 1329 Cyg), based on ultraviolet observations taken with the International Ultraviolet Explorer. The fluxes in the emission lines and in the continuum observed during 1978-1982 are related. It is found that the changes in the line and continuum fluxes observed in the far ultraviolet (1200-3200 A) are consistent with the 950 d period found from the visual luminosity variations. Periodicity and amplitudes found in the wavelength shifts are shown to indicate a size of the binary system of approximately 2 x 10 to the 14th cm. The emission lines are found to originate in a radiatively ionized gas with electron density in the range of 10 to the 6th to 10 to the 7th/cu cm, and electron temperature less than 15,000 K. In addition, an indication for a hot outer envelope around the whole system is observed.
Nussbaumer Harry
Schmutz Werner
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