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Discovery of 15-second Oscillations in HST observations of W Sge following the 2001 Outburst

Published online by Cambridge University Press:  12 April 2016

S. Araujo-Betancor ,
C. Knigge ,
T. R. Marsh ,
R. I. Hynes ,
D. Steeghs  and
K. S. Long
S. Araujo-Betancor
Affiliation:
University of Southampton, Dept. of Physics & Astronomy, Southampton SO17 1BJ, UK
C. Knigge
Affiliation:
University of Southampton, Dept. of Physics & Astronomy, Southampton SO17 1BJ, UK
T. R. Marsh
Affiliation:
University of Southampton, Dept. of Physics & Astronomy, Southampton SO17 1BJ, UK
R. I. Hynes
Affiliation:
University of Southampton, Dept. of Physics & Astronomy, Southampton SO17 1BJ, UK
D. Steeghs
Affiliation:
University of Southampton, Dept. of Physics & Astronomy, Southampton SO17 1BJ, UK
K. S. Long
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, USA

Abstract

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We report the discovery of 15 s oscillations in HST/STIS far-UV spectroscopic observations of WZ Sge in decline, one month after the start of its 2001 outburst. We discuss the implications of this finding for both the magnetic and pulsating white dwarf models that have been proposed to account for the 28 s oscillations.

Type
Part 3. A. Accretion Plasma diagnostics - Observations
Information
International Astronomical Union Colloquium , Volume 190: Magnetic Cataclysmic Variables , 2004 , pp. 170 - 171
Copyright
Copyright © Astronomical Society of the Pacific 2004

References

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Warner, B., & Woudt, P. A. 2002, MNRAS, in press (astro-ph/0204484)Google Scholar