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Far-UV FUSE Spectra of Peculiar Magnetic Cataclysmic Variables

Published online by Cambridge University Press:  12 April 2016

Martine Mouchet ,
Jean-Marc Bonnet-Bidaud ,
Evelyne Roueff ,
Meil Abada-Simon ,
Klaus Beuermann ,
Domitilla de Martino ,
Jean-Michel Desert ,
Roger Ferlet ,
Robert Fried  and
Boris Gänsicke
...Show all authors
Martine Mouchet
Affiliation:
Observatoire de Paris, 5 Place J. Janssen, 92190 Meudon, F
Jean-Marc Bonnet-Bidaud
Affiliation:
DAPNIA/Service d’Astrophysique, CEA-Saclay, Gif-sur-Yvette, F
Evelyne Roueff
Affiliation:
Observatoire de Paris, 5 Place J. Janssen, 92190 Meudon, F
Meil Abada-Simon
Affiliation:
Observatoire de Paris, 5 Place J. Janssen, 92190 Meudon, F
Klaus Beuermann
Affiliation:
Universtäts-Sternwarte, Göttingen, D
Domitilla de Martino
Affiliation:
Osservatorio Astronomico Capodimonte, Naples, I
Jean-Michel Desert
Affiliation:
Institut d’Astrophysique de Paris, Paris, F
Roger Ferlet
Affiliation:
Institut d’Astrophysique de Paris, Paris, F
Robert Fried
Affiliation:
Braeside Observatory, Flagstaff, AZ, USA
Boris Gänsicke
Affiliation:
Department of Physics and Astronomy, University of Southampton, UK
Steve Howell
Affiliation:
Astrophysics Group, Planetary Science Institute, Tucson, AZ, USA
Koji Mukai
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD, USA
Delphine Porquet
Affiliation:
Max-Planck-Institut fur Extraterrestrische Physik, Garching, D
Paula Szkody
Affiliation:
Department of Astronomy, University of Washington, Seattle, WA, USA

Abstract

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We present far-UV spectra of the three magnetic cataclysmic variables (MCVs) BY Cam, V1309 Ori and AE Aqr obtained with the FUSE satellite. These MCVs have revealed strongly unusual NV and CIV UV resonance lines. The FUSE spectra exhibit broad OVI lines as well as a strong NIII line at 991Å, while the CIII 1175Å line is nearly absent, supporting non-solar CNO abundances of the accreting matter in these sources. The spectrum of BY Cam shows molecular H2 lines which might be of circumstellar nature. The flaring activity of AE Aqr is also observed in the far-UV range. The radial velocities of the broad OVI components in AE Aqr are orbitally modulated and would indicate an emission region close to the magnetosphere.

Type
Part 3. A. Accretion Plasma diagnostics - Observations
Information
International Astronomical Union Colloquium , Volume 190: Magnetic Cataclysmic Variables , 2004 , pp. 142 - 148
Copyright
Copyright © Astronomical Society of the Pacific 2004

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