Beat Frequency Modulation of T Tauri Accretion Rates

Details Beat Frequency Modulation of T Tauri Accretion Rates Beat Frequency Modulation of T Tauri Accretion Rates

1995-04-10

arxiv.org/abs/astro-ph/9504027v1

Astronomy and Astrophysics

Astrophysics

uuencoded compressed postscript. The preprint are also available at http://www.ast.cam.ac.uk/preprint/PrePrint.html

Scientific paper

A general model of magnetically controlled accretion onto T Tauri stars is presented. In this model the magnetic field is oriented arbitrarily in relation to the star's rotation axis. The resultant interplay between the magnetic field and accretion disc causes a variable accretion rate. The dominant timescale of this variability is the beat frequency between the stellar rotation frequency and the orbital frequency at the magnetosphere boundary. This model is analogous to that developed to explain quasi-periodic oscillations in low-mass X-ray binaries.

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