Do observations reveal accretion discs in intermediate polars?

Details Do observations reveal accretion discs in intermediate polars? Do observations reveal accretion discs in intermediate polars?

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.251..693h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 251, Aug. 15, 1991, p. 693-697.

Astronomy and Astrophysics

Astronomy

52

Accretion Disks, Binary Stars, Stellar Mass Accretion, Cataclysmic Variables, Polarity, White Dwarf Stars

Scientific paper

It has been proposed that intermediate polars do not accrete through disks and that they may not possess disks. Observations of eclipses and emission lines provide strong evidence that disks are present in many intermediate polars, although it is less clear whether the accretion flows through these disks. An analysis of the Exosat database shows that many systems have orbital and beat period modulations which are small compared to the spin-pulses, suggesting disk accretion. There are, though, exceptions, notably TX Col where dominant orbital and beat period modulations indicate diskless accretion.

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