Poster Presentation

Investigating the Dust Clump Pattern Speed in Protoplanetary Disk MWC 758

Author(s): Kuo, I-Hsuan (ASIAA); Yen, Hsi-Wei (ASIAA); Gu, Pin-Gao (ASIAA)

Presenter: I-Hsuan Kuo (ASIAA)

Pressure maxima in protoplanetary disks are known to form dust-trapping vortices that may be triggered by giant protoplanets perturbing the disk. Such vortices are important for concentration and growth of dust grains into larger aggregates. Two large compact dust structures have been observed in the protoplanetary disk around MWC 758 and are inferred to be vortices. In this study, we aim to derive the motion of the dust clumps. We calculate the proper motion of the dust clumps using Band 6 continuum data from Cycle 5 and Cycle 8 ALMA data. We found sub-Keplerian motion at the inner dust clump that passes through the eccentric ring at 0.’’32, and super-Keplerian motion at the outer dust clump at ~0.’’53. I will discuss these results in the context of vortex dynamics and the pressure structure of the MWC 758 disk.