Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26as...33..327k&link_type=abstract
Astronomy and Astrophysics Supplement Series, vol. 33, Sept. 1978, p. 327-337. Deutsche Forschungsgemeinschaft
Astronomy and Astrophysics
Astronomy
7
Light Curve, Novae, Stellar Evolution, Stellar Spectrophotometry, Distance, Infrared Astronomy, Line Spectra, Radial Velocity, Spectral Line Width, Spectrum Analysis, Stellar Magnitude
Scientific paper
Ten spectrograms of Nova Vul 1976 obtained over a period of almost one year with dispersions of 40 to 60 A/mm are analyzed. The spectral evolution of the nova is described in terms of the principal spectrum, the diffuse enhanced spectrum, the Orion spectrum, and the nebular stage. A distance of about 1670 pc is derived from polarization data, polarization-absorption and absorption-distance diagrams, the visual light curve, and IR observations. An absolute magnitude at maximum light of -6.8 is estimated along with a shell radius near maximum of 650 solar radii, a brightening range of approximately 11.8 magnitudes, and an absolute magnitude of about 5.0 for the prenova object. It is suggested that Nova Vul 1976 can be classified as a medium fast nova with a time of decline through three magnitudes of about 58 days. Peculiar features of the nova light curve are briefly discussed.
Klare Gerhard
Wolf Bernd
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