Simultaneous X-ray and Optical Observations of EX Hydrae

Details Simultaneous X-ray and Optical Observations of EX Hydrae Simultaneous X-ray and Optical Observations of EX Hydrae

2005-01-06

arxiv.org/abs/astro-ph/0501087v1

Astronomy and Astrophysics

Astrophysics

to appear in the Astronomical Journal, April 2005

Scientific paper

10.1086/428487

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.

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