The spectrum of Nova CYG 1975 = V1500 CYG in the near-infrared

Astronomy and Astrophysics – Astronomy

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Infrared Astronomy, Near Infrared Radiation, Novae, Stellar Spectra, Cygnus Constellation, Electrophotometry, Emission Spectra, Forbidden Bands, Planetary Nebulae

Scientific paper

Observations of the spectrum of Nova Cyg 1975 in the region from 6000 to 11,000 A are presented, consisting of photoelectric scans made on September 3-4 and 18-19, 1975, and spectrograms taken on September 25-26, 1975. For most of emission lines identified in the spectrum, the absolute flux and equivalent width are determined. The emission-line spectrum of the nova obtained on September 3-4, 1975, was due to H I, He I, N I, O I, C I, and S I. The forbidden lines of N I, O I, O II, and S III marking the nebular stage of the nova appeared in the spectrum of September 18-19, 1975.

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