Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-01-07
Mon.Not.Roy.Astron.Soc. 356 (2005) 1489
Astronomy and Astrophysics
Astrophysics
14 pages, 12 figures. Published in MNRAS
Scientific paper
10.1111/j.1365-2966.2004.08601.x
We present hydrogen emission line profile models of magnetospheric accretion onto Classical T Tauri stars. The models are computed under the Sobolev approximation using the three-dimensional Monte Carlo radiative-transfer code TORUS. We have calculated four illustrative models in which the accretion flows are confined to azimuthal curtains - a geometry predicted by magneto-hydrodynamical simulations. Properties of the line profile variability of our models are discussed, with reference to dynamic spectra and cross-correlation images. We find that some gross characteristics of observed line profile variability are reproduced by our models, although in general the level of variability predicted is larger than that observed. We conclude that this excessive variability probably excludes dynamical simulations that predict accretion flows with low degrees of axisymmetry.
Harries Tim J.
Kurosawa Ryuichi
Symington Neil H.
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