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Title: Spectroscopic evolution of Nova LW Serpentis 1978 during its early decline
Authors: Prabhu, T. P
Anupama, G. C
Keywords: Astronomical spectroscopy;Novae;Variable stars;H alpha line;Line spectra;Near infrared radiation;Oxygen spectra
Issue Date: Dec-1987
Publisher: Indian Academy of Sciences
Citation: Journal of Astrophysics and Astronomy , Vol. 8, No. 4, pp. 369 - 387
Abstract: Spectroscopic observations of Nova LW Serpentis have been obtained in 1978 during its decline from V of about 9.0 to V of about 10.2. It is found that the spectrum and its evolution compare well with those of a typical nova, and that the principal absorption could be identified only in the lines of O I 7774, 8446, and in moderate-resolution observations of H-alpha. Features of the spectral evolution noted include the continuous weakening of the near-infrared triplet of Ca II, the brightness of O I 8446 over O I 7774, and the asymmetric nature of the H-alpha emission line. A kinematical model is proposed for the shell of LW Ser consisting of an equatorial ring and a polar cone on the side facing away from the earth.
ISSN: 0250-6335
Appears in Collections:IIAP Publications

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