A search for the 2omega-Omega frequency in the X-ray light curves of intermediate polars

Details A search for the 2omega-Omega frequency in the X-ray light curves of intermediate polars A search for the 2omega-Omega frequency in the X-ray light curves of intermediate polars

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.258..578h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 258, no. 3, p. 578-580.

Astronomy and Astrophysics

Astronomy

21

Accretion Disks, Cataclysmic Variables, Light Curve, Magnetic Stars, White Dwarf Stars, X Ray Stars, Exosat Satellite, Spaceborne Astronomy, Stellar Evolution, Stellar Spectra

Scientific paper

Wynn and King (1992) have shown that diskless accretion gives rise to modulations at either the omega-Omega or 2omega-Omega frequencies in the X-ray light curves of intermediate polars. However, the EXOSAT archive shows no sign of a 2omega-Omega modulation in any of the systems observed. An omega-Omega modulation larger than half the spin-pulse amplitude has been seen only once, while generally the omega-Omega pulses are weak or absent. Unless the spin periods are misidentified, this implies that the intermediate polars accrete predominantly, though in some systems not exclusively, through disks.

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