Spectroscopic evolution of Nova LW Serpentis 1978 during its early decline

Details Spectroscopic evolution of Nova LW Serpentis 1978 during its early decline Spectroscopic evolution of Nova LW Serpentis 1978 during its early decline

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987japa....8..369p&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 8, Dec. 1987, p. 369-387.

Astronomy and Astrophysics

Astrophysics

1

Astronomical Spectroscopy, Novae, Stellar Evolution, Variable Stars, H Alpha Line, Line Spectra, Near Infrared Radiation, Oxygen Spectra

Scientific paper

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.

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