Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.236..935c&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 236, Feb. 15, 1989, p. 935-957. Research supported by t
Astronomy and Astrophysics
Astronomy
35
Binary Stars, Polarimetry, Stellar Mass Accretion, X Ray Sources, Orbits, Photometry, Red Dwarf Stars, White Dwarf Stars
Scientific paper
New polarimetric and photometric data on V834 Cen are presented in which the shape of the orbital variation of the position angle is seen to change at different observing epochs. Because this is not permitted under the assumptions of radial accretion at the magnetic poles, the equations for a magnetic accretion geometry have been developed. With this model, a more accurate determination of the inclination and magnetic colatitude is made. However, in some of the data even this model is inadequate and it is found that accretion near the second magnetic pole is required. It is also found that the main accretion region is substantially extended and that the changing morphology of the linear polarization and position angle curves is the result of varying accretion rates at the leading edge of the accretion arc. It is proposed that the changes in the light-curve shape from single- to double-peaked is a result of this varying accretion profile along the arc.
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