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Spectroscopy of CN Orionis*

Published online by Cambridge University Press:  12 April 2016

K.H. Mantel ,
H. Barwig ,
R. Haefner  and
R. Schoembs
K.H. Mantel
Affiliation:
Universitaetssternwarte Muenchen, Muenchen, F.R.G.
H. Barwig
Affiliation:
Universitaetssternwarte Muenchen, Muenchen, F.R.G.
R. Haefner
Affiliation:
Universitaetssternwarte Muenchen, Muenchen, F.R.G.
R. Schoembs
Affiliation:
Universitaetssternwarte Muenchen, Muenchen, F.R.G.

Abstract

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Two outbursts and a minimum phase of the dwarf nova CN Orionis have been observed spectroscopically. One outburst was covered almost completely. The outburst spectra show periodic variations of the absorption lines which are interpreted with the formation of an elliptic disc during outburst stage. During decline from outburst a narrow emission line appears in the core of the broad H« absorption line. The balmer decrement in the outburst phase is much steeper than in the minimum phase. This implies that during the outburst the emission line region is located more outward in the disk. The semi amplitude of the radial velocity curve was determined to Kl = 152 km/s ± 10 km/s. Using the photometric orbital period and an assumption about the inclination angle the approximate system parameters could be derived.

Type
V. Nova and Dwarf Nova Outbursts
Information
International Astronomical Union Colloquium , Volume 93: Cataclysmic Variables: Recent Multi-Frequency Observations and Theoretical Developments , 1987 , pp. 501 - 505
Copyright
Copyright © Reidel 1987

Footnotes

*

Based on observations colleted at the European Southern Observatory, La Silla, Chile and at Mount Stromlo Observatory, Canberra, Australia.

References

Literature

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