Astronomy and Astrophysics Letters dedicated to ISO

ISO observations of the classical nova V1974 Cygni

A. Salama - A. Evans - S. P. S. Eyres - K. Leech - P. Barr - M. F. Kessler


We present observations of the classical nova V1974 Cygni (Nova Cyg 1992) obtained with the ISO Short and Long Wavelength Spectrometers (SWS and LWS) and the spectrometer section of ISOPHOT. We identify [NeIII] 15.5, [NeV] 14.3, 24.3, [NeVI] 7.6, [OIII] 51.8, [OIV] 25.9. There is evidence that the Ne and O emission arises in physically distinct regions of the ejecta. We determine the electron temperatures in the Ne- and O-bearing regions of the ejecta, and estimate the Ne abundance relative to O.

circumstellar matter - Stars: individual: V1974 Cyg - novae, cataclysmic variables - Infrared: stars

Full text