Nova Cygni 2001/2 = V2275 Cyg^*

¹ Department of Experimental Physics and Astronomical Observatory, University of Szeged, Szeged, Dóm tér 9., 6720, Hungary
² Department of Optics and Quantum Electronics, University of Szeged, POB 406, Szeged, 6701, Hungary
³ David Dunlap Observatory, University of Toronto, Richmond Hill, Canada

Corresponding author: L. L. Kiss, l.kiss@physx.u-szeged.hu

Received: 26 November 2001
Accepted: 11 January 2002

Abstract

We present an analysis of low- and medium resolution spectra of the very fast nova, Nova Cygni 2001/2 (V2275 Cyg) obtained at nine epochs in August, September and October, 2001. The expansion velocity from hydrogen Balmer lines is found to be 2100 km s^-1, although an early Hα profile showed a weak feature at -3500 km s^-1, too. The overall appearance of the optical spectrum is dominated by broad lines of H, He and N, therefore, the star belongs to the “He/N” subclass of novae defined by Williams ([CITE]). Interstellar lines and bands, as well as BV photometry taken from the literature yielded to a fairly high reddening of . The visual light curve was used to deduce M_V by the maximum magnitude versus rate of decline relationship. The resulting parameters are: ,  days,  days, . Adopting these parameters, the star lies between 3 kpc and 8 kpc from the Sun.