Speaker
Aly Hossam
(University of Milan)
Description
The binary system GG Tau A is observed to have a circumbinary disc with a
dust ring located further out than expected from tidal truncation theory.
Given the binary separation, this large cavity can be explained by relaxing
the assumption of a co-planar disc and instead fit the observations with a
mis-aligned circumbinary disc around an eccentric binary with a wider
semi-major axis. I present the results of SPH simulations to check this
possibility and investigate the long term evolution of such a system. I
find that a misalignment angle of 30 degrees and a binary eccentricity of
0.45 fit both the astrometric data and the disc cavity.
Primary author
Aly Hossam
(University of Milan)
