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Nova AQL 1918: a nude old nova*

Published online by Cambridge University Press:  12 April 2016

P.L. Selvelli
Affiliation:
Astronomical Observatory of Trieste (Italy)
A. Cassatella
Affiliation:
Astronomy Division ESTEC - Villafranca, Satellite Tracking Station - ESA - Apartado 54065 - Madrid (Spain)

Abstract

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IUE observations at high and low resolution of Nova Aql 1918 show neither evidence of outflow nor the presence of nebular lines. This indicates that the shell ejected at the time of the outburst and surrounding the system for many years (Mustel and Boyarchuck, 1970) has by now disappeared.

The high excitation spectrum presents rapid variations in the far UV and eclipse effects in the near UV that seem well correlated with the orbital phase.

The observations can be interpreted in terms of phenomena occurring in or near the accretion disk surrounding the white dwarf. However, the small inclination of the orbital axis raises serious problems in trying to model the system.

Type
Session VIII - Effects of Mass Loss on the Evolution of Binary Stars
Copyright
Copyright © Reidel 1981

Footnotes

*

Based on observations with the IUE collected at the Villafranca Satellite Tracking Station of the European Space Agency.

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