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Far-UV FUSE Spectra of Peculiar Magnetic Cataclysmic Variables

  • Martine Mouchet (a1), Jean-Marc Bonnet-Bidaud (a2), Evelyne Roueff (a1), Meil Abada-Simon (a1), Klaus Beuermann (a3), Domitilla de Martino (a4), Jean-Michel Desert (a5), Roger Ferlet (a5), Robert Fried (a6), Boris Gänsicke (a7), Steve Howell (a8), Koji Mukai (a9), Delphine Porquet (a10) and Paula Szkody (a11)...

Abstract

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.

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References

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Far-UV FUSE Spectra of Peculiar Magnetic Cataclysmic Variables

  • Martine Mouchet (a1), Jean-Marc Bonnet-Bidaud (a2), Evelyne Roueff (a1), Meil Abada-Simon (a1), Klaus Beuermann (a3), Domitilla de Martino (a4), Jean-Michel Desert (a5), Roger Ferlet (a5), Robert Fried (a6), Boris Gänsicke (a7), Steve Howell (a8), Koji Mukai (a9), Delphine Porquet (a10) and Paula Szkody (a11)...

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