Accretion in a peculiar dwarf nova

Physics

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White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Ey Cyg, Xmm-Newton Proposal 04006701

Scientific paper

We propose to observe EY Cyg, a dwarf nova that shows signatures of a past nova explosion, an ideal target to study the physics of accretion. It is a known X-ray source at low inclination, and a long period system, allowing a useful comparison with two short period novae recently observed in X-rays at quiescence, and with dwarf novae atlow inclination. EY Cyg is also one of very few relatively X-ray bright cataclysmic variables at quiescence, but it has never been observed in X-rays except for very short, mostly serendipitous exposures. We have already studied this system in great detail at ultraviolet and optical wavelengths, but good quality data in the X-ray range are still missing.

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