Oral Presentation

Substructure Survey of Taurus-Auriga Protoplanetary Disks with ALMA Super-resolution Imaging

Author(s): Masayuki Yamaguchi (Academia Sinica Institute of Astronomy and Astrophysics)

Presenter: Masayuki Yamaguchi (ASIAA)

We present extremely high resolution (0”.02 - 0".1) images of the 1.3 mm continuum emission from 43 Taurus-Auriga protoplanetary disks (PPDs) by using the ALMA archival data of Band 6. For image reconstruction, we applied the sparse modeling (SpM) imaging technique that possibly improves the fidelity and spatial resolution of the ALMA images. We obtained images with spatial resolutions of 0".02-0".1 (3-14 au), which is 2-3 times better than those of the conventional CLEAN images. More than half of the disks have a gap and ring; 22 disks with gaps & rings, 13 disks with abrupt changes in the slopes of the radial intensity profile but are not identified as gaps (i.e., unresolved gaps), and three disks with a ring alone. In addition, most disks around A-F-G type stars have an azimuthal asymmetry and inner disk. These results provide new insight into our understanding that substructures such as gaps and rings are found to be common even for any PPDs in the Taurus star-forming regions.