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Spectral evolution of the two classical novae PW Vul and V1668 Cyg using International Ultraviolet Explorer low‑resolution spectra

Sanad, M. R.; Yousef, S.; Essam, A. +2 more

We studied the evolution of the normalized flux of selected ultraviolet (UV) emission lines of two classical novae (PW Vul and V1668 Cyg) using International Ultraviolet Explorer (IUE) short wavelength observations. Different phases of the outburst are studied. Emission lines covering a wide range of ionization states are investigated. We use the …