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Beat frequency modulation of T Tauri accretion rates
Author(s) -
K. W. Smith,
I. A. Bonnell,
Geraint F. Lewis
Publication year - 1995
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-8711
pISSN - 0035-8711
DOI - 10.1093/mnras/276.1.263
Subject(s) - physics , t tauri star , astrophysics , accretion (finance) , magnetosphere , intermediate polar , stellar rotation , magnetic field , astronomy , accretion disc , variable star , stars , white dwarf , quantum mechanics
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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