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| Paper: |
A New Scheme to Solve Gas Disks around Stars |
| Volume: |
429, Numerical Modeling of Space Plasma Flows, Astronum-2009 |
| Page: |
241 |
| Authors: |
Hanawa, T. |
| Abstract: |
We have developed a new scheme to solve gaseous disks
rotating around stars. The scheme evaluates centrifugal
force more accurately by decomposing the
gas velocity into two components,
the reference velocity and deviation from it.
The reference velocity is set to be the Keplerian
rotation one and gravity is reduced apparently by
cancelation with the centrifugal force. Thanks to
the reference velocity, the softening radius of gravity
can be reduced to only 7% of the binary separation.
We apply this method to accretion from a circumbinary
disk to unequal mass binary and find that the inflow from
L2 point is not captured directly by the secondary.
We also apply this method to classical T Tau binary,
V4046 Sgr. The model suggests hot spots on the circumstellar
disks as a candidate for the origin of broad Balmer emission
lines observed. |
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