EX Hya - The slowest DQ HER star?

Astronomy and Astrophysics – Astronomy

Scientific paper

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Angular Velocity, Cataclysmic Variables, Stellar Rotation, Stellar Spectrophotometry, Visible Spectrum, White Dwarf Stars, Binary Stars, Orbital Elements, Stellar Evolution, Stellar Luminosity, Stellar Models

Scientific paper

The authors report the results of a photometric programme on the cataclysmic variable EX Hya. New eclipse timings, as well as new timings for the 67-min photometric modulation are presented and discussed. The authors suggest that EX Hya is a member of the DQ Her subclass of cataclysmic variables, in which the optical modulation is thought to be associated to the non-synchronous rotation of a white dwarf in the binary system.

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