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Abstract:

Substructures in protoplanetary Protoplanetary disk is one key feature for understanding planet formation. ALMA has revealed that many protoplanetary disks harbor rings, gaps and/or non-axisymmetric structures and the connection between such structures and planet formation and/or disk evolution is actively discussed. Yet, high resolution observations with ALMA requires long baseline observations that are expensive and therefore the number of disks that are fully resolved is still limited. Sparse modeling technique is a promising method for reconstructing a high spatial resolution image from data obtained with relatively short baseline. We present the results of our survey that has applied sparse modeling to a set of ALMA archival data of protoplanetary disks in Taurus and Ophiuchus regions. We discuss statistical properties of disk (sub)structures and indication on planet formation. We also present studies on some individual targets, if time allows.