On the effects of the stellar magnetic field on the structure of T Tauri accretion discs

Details On the effects of the stellar magnetic field on the structure of T Tauri accretion discs On the effects of the stellar magnetic field on the structure of T Tauri accretion discs

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mnras.331..578u&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 331, Issue 3, pp. 578-586.

Astronomy and Astrophysics

Astronomy

4

Accretion, Accretion Discs, Stars: Magnetic Fields, Stars: Pre-Main-Sequence

Scientific paper

The structure of accretion discs around magnetic T Tauri stars is calculated numerically using a particle hydrodynamical code, in which magnetic interaction is included in the framework of King's diamagnetic blob accretion model. Setting up the calculation so as to simulate the density structure of a quasi-steady disc in the equatorial plane of a T Tauri star, we find that the central star's magnetic field typically produces a central hole in the disc and spreads out the surface density distribution. We argue that this result suggets a promising mechanism for explaining the unusual flatness (IR excess) of T Tauri accretion disc spectra.

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