IUE observations of E1405-451 - A new AM Herculis type cataclysmic variable

Astronomy and Astrophysics – Astronomy

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Emission Spectra, Iue, Line Spectra, Ultraviolet Astronomy, Variable Stars, B Stars, Black Body Radiation, Interstellar Extinction, Ultraviolet Spectra

Scientific paper

International Ultraviolet Explorer observations of the recently discovered AM Herculis type cataclysmic variable E1405-451 reveal a UV spectrum (1000-3000 A) similar to the other members of the type. The continuum flux distribution rises steeply at short wavelength and shows the effects of interstellar extinction. Best fit parameters for a blackbody spectrum are T = 25,500 + or - 2300 K with E(B-V) = 0.13 + or - 0.05. Many strong emission lines appear in the spectrum with similar intensities to those in AM Her. C IV 1550 and He II 1640 show some sign of a P Cygni profile. If these profiles are truly P Cygni, they indicate the intriguing possibility of a magnetically confined, radiatively driven wind present in all AM Her systems but only observable in a subset with an orientation like E1405-451.

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