S21A0149
S21A0149
Direct observational evidence of a forming planet in a protoplanetary disk around a young star is crucial in understanding the formation and diversity of exoplanets. A forming planet is expected to be surrounded by a circumplanetary disk (CPD) from which materials continuously accrete onto the planet, and that is one of the promising objects that we can directly detect. Recently two such planets, PDS 70b and c, have been identified inside the cavity in the PDS 70 transitional disk. HΞ± emission has been detected from PDS 70b using Magellan/MagAO and from both PDS 70 b and c with VLT/MUSE. However, a natural question arises: is PDS 70 a special case among transitional disks, or do most (or all) transitional disks have accreting giant planets forming inside? To make progress toward answering this question, in this program we propose to search for accreting planets in the J160421.7-213028 disk (J1604), a close analog to PDS 70, and TW Hya, the nearest protoplanetary disk to us with potential protoplanets. We will look for planetary accretion signatures in HΞ± line emission in the J1604 and TW Hya disks with Subaru/SCExAO+VAMPIRES. Simultaneously, we will image the disk in scattered light at multiple wavelengths using CHARIS to probe dust grain size and type.
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