S21B0085

Subaru/HiCIAO, VLT/SPHERE, and Gemini/GPI have conducted successful large near-infrared polarimetric imaging surveys of protoplanetary disks around intermediate mass stars (M_star>∼2 M_⊙) to discover many substructures, such as gaps and spirals. These surveys have been heavily biased toward older systems (>∼3 Myr). Here we propose SCExAO fast-PDI imaging of 12 protoplanetary disks around younger intermediate mass stars to investigate the morphology of the disks and planet formation around those stars. Theoretical modeling has shown that observed gaps and spirals in disks in scattered light imaging are likely produced by Jovian planets. Thus, if we successfully detect sub-structures such as rings and spirals at tens of au, our observations would suggest that massive giant planets (M_P >∼1 M_Jup) have formed around intermediate mass stars at a younger age (<∼3 Myr). Since core accretion planet formation theories predict that the formation time scale of giant planets at tens of au is beyond ∼1 Myr, our discoveries would suggest that the formation of gas giant planets is more efficient than previously thought.

This document was translated from L^AT_EX by H^EV^EA.