Host: The Japanese Society for Planetary Sciences: Local Organizing Committee for 2006 Fall Meeting
We obtained a high resolution (about 0".1=14AU) near-infrared image of UY Aur using Coronagraphic Imager with Adaptive Optics (CIAO) on the Subaru Telescope. UY Aur is a classical T Tauri binary system in the Taurus-Auriga star forming region. The H-band magnitude of the secondary (UY Aur B) varies about 1.5 mag in a decade while that of the primary (UY Aur A) is stable. We detected the UY Aur circumbinary disk with a clumpy structure and a gap between the UY Aur binary and the disk. The lower limit of the clump mass is calculated to be about 6 Earth mass, assuming that the clump is bright due to the scattering light of the UY Aur binary.
