Photometry of the intermediate polar TV Columbae

Details Photometry of the intermediate polar TV Columbae Photometry of the intermediate polar TV Columbae

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..759b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, Aug. 15, 1988, p. 759-771. Research supported by t

Astronomy and Astrophysics

Astronomy

58

Astronomical Photometry, Cataclysmic Variables, Dwarf Novae, Light Curve, Magnetic Stars, X Ray Sources, Accretion Disks, Circular Polarization, Stellar Mass, White Dwarf Stars

Scientific paper

Thirty-seven hours of high-speed photometry of TV Col, spread over a three-week baseline, are analyzed for periodicities. The previously known 5.2 hr, 5.5 hr and 4.0 day periods are confirmed; mean light curves at those periods are presented. There is no sign in our optical observations of the 1911 s X-ray period reported by Schrijver et al. (1985). An extension of the freely precessing disk model of Bonnet-Bidaud et al. (1985) is proposed to explain the occurrence of the multiple periods. It is suggested that the disk is maintained in a tilted position with respect to the orbital plane by being fed by material controlled by the magnetic field of the secondary. A surface field of about 200 G appears to be adequate to supply such guided material.

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