A&A 387, 550-559 (2002)
Circumbinary disk evolutionR. Günther and W. Kley
Institut für Astronomie & Astrophysik, Abt. Computational Physics, Auf der Morgenstelle 10, 72076 Tübingen, Germany
(Received 21 January 2002 / Accepted 14 March 2002 )
We study the evolution of circumbinary disks surrounding classical T Tau stars. High resolution numerical simulations are employed to model a system consisting of a central eccentric binary star within an accretion disk. The disk is assumed to be infinitesimally thin, however a detailed energy balance including viscous heating and radiative cooling is applied. A novel numerical approach using a parallelized Dual-Grid technique on two different coordinate systems has been implemented. Physical parameters of the setup are chosen to model the close system of DQ Tau and AK Sco , as well as the wider systems of GG Tau and UY Aur . Our main findings are for the tight binaries a substantial flow of material through the disk gap which is accreted onto the central stars in a phase dependent process. We are able to constrain the parameters of the systems by matching both accretion rates and derived spectral energy distributions to observational data where available.
Key words: accretion, accretion disks -- binaries: general -- hydrodynamics -- methods: numerical
Offprint request: R. Günther, email@example.com
© ESO 2002