DIRECT IMAGING OF FINE STRUCTURES IN GIANT PLANET-FORMING REGIONS OF THE PROTOPLANETARY DISK AROUND AB AURIGAE

摘要: We report high-resolution 1.6 μm polarized intensity (PI) images of the circumstellar disk around Herbig Ae star AB Aur at a radial distance 22 AU (015) up to 554 (385), which have been obtained by high-contrast instrument HiCIAO with dual-beam polarimetry. revealed complicated and asymmetrical structures in inner part (140 AU) while confirming previously reported outer (r 200 spiral structure. imaged double ring structure ~40 ~100 ring-like gap between two. found significant discrepancy inclination angles two rings, may indicate that is warped. Furthermore, we seven dips (the typical size ~45 or less) within as well three prominent PI peaks AU. The observed structures, including bumpy ring, gap, warped innermost regions, provide essential information for understanding formation mechanism recently detected wide-orbit > 20 planets.