Spectroscopic studies of Nova Cygni 1975 during early decline

Details Spectroscopic studies of Nova Cygni 1975 during early decline Spectroscopic studies of Nova Cygni 1975 during early decline

Oct 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976pasp...88..741s&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 88, Oct.-Nov. 1976, p. 741-749.

Astronomy and Astrophysics

Astronomy

2

Emission Spectra, Light Curve, Line Spectra, Novae, Radial Velocity, Stellar Spectra, H Lines, Spectral Energy Distribution, Spectral Line Width, Stellar Evolution, Stellar Luminosity, Tables (Data), Ubv Spectra

Scientific paper

Various spectral features of Nova Cygni 1975 at early decline phase are identified and their radial velocities determined from high-dispersion spectra obtained on JD2442659. The velocities of the blue-shifted absorption and emission features for hydrogen lines are found to be different from those of the metals. The distance of the nova has been determined to be 2.2 kpc. Three distinct types of emission features are distinguished. Arguments are put forward to show that Nova Cygni 1975 is not a supernova. The possibility of a preoutburst rise according to Bath's (1969) mechanism is discussed.

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