Kavli Affiliate: Ruobing Dong | First 5 Authors: Ruobing Dong, Rebekah Dawson, , , | Summary: Transitional disks, protoplanetary disks with deep and wide central gaps, may be the result of planetary sculpting. By comparing numerical planet-opening-gap models with observed gaps, we find systems of 3-6 giant planets are needed in order to open gaps […]