Poster Presentation

Low Radio Flux of Planet-mass Companions: Compact Circumplanetary Disks?

Author(s): Ya-Lin Wu (University of Arizona); Laird Close (University of Arizona); Josh Eisner (University of Arizona); Patrick Sheehan (University of Oklahoma)

Presenter: Ya-Lin Wu (University of Arizona)

Planet-mass companions discovered in high-contrast imaging surveys are ideal to search for the presence of circumplanetary disks because they are widely separated from their host stars. I will present our ALMA observations on planetary companions. We find that FW Tau C has a dynamical mass of 0.1 solar masses, so it is actually a low-mass star. We also suggest that disks around wide companions are probably very compact, so they are faint and optically thick in radio wavelengths. Mid-infrared observations with JWST may be able to constrain disk sizes.