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VY Sculptoris stars are Magnetic Cataclysmic Variables

Published online by Cambridge University Press:  12 April 2016

Jean-Pierre Lasota  and
Jean-Marie Hameury
Jean-Pierre Lasota
Affiliation:
UMR 7095 du CNRS, Institut d’Astrophysique de Paris, 98bis Boulevard Arago, 75014 Paris, France
Jean-Marie Hameury
Affiliation:
UMR 7550 du CNRS, Observatoire de Strasbourg, 11 rue de l’Université, F-67000 Strasbourg, France

Abstract

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We show that VY Scl stars must be magnetized in order to account for the absence of outbursts during their low and intermediate states. Absence of outbursts during low states requires only rather low magnetic moments but in systems in which the drops and rises of luminosity are slower than it takes for the accretion disc to adjust viscously to the variation in mass-transfer rate preventing outbursts require magnetic moments of Intermediate Polars. We discuss some evolutionary aspects of this conclusion.

Type
Part 1. Population and Evolution
Information
International Astronomical Union Colloquium , Volume 190: Magnetic Cataclysmic Variables , 2004 , pp. 46 - 52
Copyright
Copyright © Astronomical Society of the Pacific 2004

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