  A high angular resolution near-infrared polarized-intensity image of the GG
Tau A binary system was obtained with the Subaru Telescope. The image shows the
circumbinary disk scattering the light from the central binary. The azimuthal
profile of the polarized intensity of the circumbinary disk is roughly
reproduced by a simple disk model with the Henyey-Greenstein function and the
Rayleigh function, indicating small dust grains at the surface of the disk.
Combined with a previous observation of the circumbinary disk, our image
indicates that the gap structure in the circumbinary disk orbits
anti-clockwise, while material in the disk orbit clockwise. We propose a shadow
of material located between the central binary and the circumbinary disk. The
separations and position angles of the stellar components of the binary in the
past 20 years are consistent with the binary orbit with a = 33.4 AU and e =
0.34.
