Stream-fed and disc-fed accretion in TX Columbae

Details Stream-fed and disc-fed accretion in TX Columbae Stream-fed and disc-fed accretion in TX Columbae

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.289..362n&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 289, Issue 2, pp. 362-370.

Astronomy and Astrophysics

Astronomy

36

Accretion, Accretion Discs, Stars: Individual: Tx Col, Stars: Individual: H0542-407, Novae, Cataclysmic Variables, X-Rays: Stars

Scientific paper

We report on two recent X-ray observations of the intermediate polar TX Col made with ASCA and ROSAT. From a consideration of the power spectra of their light curves, we show that the system was accreting predominantly via a disc in 1994 October, but had reverted to a disc-overflow mode of accretion by 1995 October, at which time a substantial amount of the accretion was directly via a stream. We discuss possible reasons for this change. By considering the relative phases of the spin and beat pulsations seen in the ROSAT data, as well as their orbital harmonics, we demonstrate that the stream-fed accretion regions on the white dwarf surface remain fixed at about orbital phase 0.7, and thus migrate around the white dwarf. We suggest that the observed orbital modulation results from a combination of two effects: first, attenuation of emission sites by material located at the stream-disc boundary at orbital phase 0.8, and, secondly, the changing visibility of the stream-fed accretion sites which are always on the side of the white dwarf facing the stream.

Affiliated with

Also associated with

No associations

Rating

Stream-fed and disc-fed accretion in TX Columbae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Stream-fed and disc-fed accretion in TX Columbae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stream-fed and disc-fed accretion in TX Columbae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-806814