Ya-Lin Wu (NTNU), Brendan Bowler (UT Austin)
Characterizing wide-orbit planetary-mass companions (PMCs) at millimeter wavelengths can provide important insights into their origin. While many young PMCs have evidence of disks from optical/infrared observations, our ALMA 0.88 mm and 1.3 mm surveys of PMC disks did not detect any continuum sources at the locations of the companions down to 3-sigma limits of 100-200 microjanskys. Several physical mechanisms may explain the faint radio brightness of these companion disks. Sensitive continuum imaging at rms levels of <10 microjanskys may be required to detect these disks and test if they follow the same scaling relations of single or binary stars.