Circumbinary Disk Evolution
Richard Günther & Wilhelm Kley
submitted to A&A
Abstract:
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.
Version: Mar. 20th, 2002
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