The structure of the cataclysmic variable GD 1401

Computer Science

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Cataclysmic Variables, Stellar Spectra, Stellar Structure, Accretion Disks, Balmer Series, Stellar Models, White Dwarf Stars

Scientific paper

Spectra of GD 1401, a faint (V = 14 m.4) apparently cataclysmic object are presented. The generally accepted model for novalike systems fails to explain the stong Balmer lines in absorption at all phases. A nonstandard model, where the accretion disk is optically thin in the visible region of the spectrum is proposed. The main contribution of the flux is provided by a white dwarf of spectral type DA; the emission components at certain phases are due to hot regions in the disk, or in the outermost layers of the white dwarf.

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