Phase resolved linear polarization spectra of AM Herculis

Details Phase resolved linear polarization spectra of AM Herculis Phase resolved linear polarization spectra of AM Herculis

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...264..529s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 264, no. 2, p. 529-535.

Astronomy and Astrophysics

Astrophysics

3

Cataclysmic Variables, Linear Polarization, Stellar Magnetic Fields, Stellar Spectra, Magnetic Flux, Novae

Scientific paper

Phase resolved linear polarization spectra of AM Her are presented for the first time. They fit in the context of recent two-pole accretion models. From our polarization spectra we synthesized B, V, and R broad band observations. These are consistent with the data of Wickramasinghe et al. (1991), observed at nearly the same time. A phase dependent strong depolarization feature around 6200 A might be caused by H-alpha-sigma(-) absorption. The wavelength variation with phase of this feature is explained by means of different field strengths at the two accretion spots. A possible contribution to this wavelength shift due to Doppler effect is estimated in the geometry given by Wickramasinghe et al. (1991).

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