Investigation of Nova Cygni 1975 = V1500 CYG at the Crimean Astrophysical Observatory. I - Spectral studies in the visible range

Details Investigation of Nova Cygni 1975 = V1500 CYG at the Crimean Astrophysical Observatory. I - Spectral studies in the visible range Investigation of Nova Cygni 1975 = V1500 CYG at the Crimean Astrophysical Observatory. I - Spectral studies in the visible range

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977azh....54..458b&link_type=abstract

Astronomicheskii Zhurnal, vol. 54, May-June 1977, p. 458-473. In Russian.

Astronomy and Astrophysics

Astrophysics

3

Novae, Stellar Spectra, Supergiant Stars, Astrophysics, Carbon, Cygnus Constellation, Light (Visible Radiation), Nitrogen, Oxygen

Scientific paper

Results are presented for studies of spectra of V1500 Cyg obtained with slit spectrographs over the wavelength range from 3550 to 6800 A. It is found that the nova spectrum on August 29, 1975, resembled that of a normal B2 Ia(+) supergiant without emission lines. Chemical composition is analyzed by a curve-of-growth technique, and a significant enrichment in helium and CNO-group elements is determined along with a normal Si abundance. P Cyg-type profiles were observed in the nova spectrum on August 30 and 31, 1975; the spectrum at that time corresponded to spectral type A2 Ia(+). It is noted that the spectral lines have become purely emission lines since September 1, 1975.

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