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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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