An analysis of the AM Her-type variables CW 1103+254 and E 1405-451

Astronomy and Astrophysics – Astronomy

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Binary Stars, Circular Polarization, Dwarf Stars, Stellar Radiation, Stellar Spectra, Variable Stars, Cyclotron Radiation, Electron Energy, Flux Quantization, M Stars, Near Infrared Radiation, Visible Spectrum, White Dwarf Stars

Scientific paper

The authors present an analysis of flux and circular polarization observations of CW 1103+254 and E 1405-451 extending from the visual to the near-infrared spectral regions. The electron temperature of the emission region which gives rise to the polarized radiation in CW 1103+254 is estimated to be in the range 15 - 30 keV linking it closely with the accretion shock. Strong arguments are presented which indicate that the geometry of the polarized emission region in E 1405-451 is more likely to be penny shaped rather than pill box shaped. The ratio of height to diameter of the emission region is estimated to be of the order of 0.1.

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