Simultaneous X-ray and Optical Observations of EX Hydrae

Abstract

The intermediate polar, EX Hydrae, was the object of a large simultaneous multiwavelength observational campaign during 2000 May - June. Here we present the Rossi X-ray Timing Explorer photometry and optical photometry and spectroscopy from ground-based observatories obtained as part of this campaign. Balmer line radial velocities and Doppler maps provide evidence for an extended bulge along the outer edge of the accretion disk and some form of extended/overflowing material originating from the hot spot. In addition, the optical binary eclipse possesses an extended egress shoulder, an indication that an additional source (other than the white dwarf) is coming out of eclipse. We also compare the X-ray and optical results with the results obtained from the EUV and UV observations from the multiwavelength data set.

to appear in the Astronomical Journal, April 2005

References in corpus (8)

• Two Types of X-ray Spectra in Cataclysmic Variables
• First Application of the Fe XVII I(17.10 A)/I(17.05 A) Line Ratio to Constrain the Plasma Density of a Cosmic X-ray Source
• Outbursts of EX Hydrae: mass-transfer events or disc instabilities?
• HST/STIS Spectroscopy of the Intermediate Polar EX Hydrae
• The Fe XXII I(11.92 A)/I(11.77 A) Density Diagnostic Applied to the Chandra High Energy Transmission Grating Spectrum of EX Hydrae
• The Radial Velocity and Mass of the White Dwarf of EX Hydrae Measured with Chandra
• Doppler tomography of intermediate polar spin cycles
• An EUV Study of the Intermediate Polar EX Hydrae

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• The Nature of the Faint Chandra X-ray Sources in the Galactic Centre
• New X-ray observations of the old nova CP Puppis and of the more recent nova V351 Pup
• Accretion column structure of magnetic cataclysmic variables from X-ray spectroscopy
• Steps towards a solution of the FS Aurigae puzzle. II. Confirmation of the intermediate polar status
• Peculiarities of the Accretion Flow in the System HL CMa
• Disc-Magnetosphere interactions in Cataclysmic Variable Stars