A low-mass protostar’s disk-envelope interface: disk-shadowing evidence from ALMA DCO⁺observations of VLA1623

Abstract

Context. Historically, due to instrumental limitations and a lack of disk detections, the structure of the transition from the envelope to the rotationally supported disk has been poorly studied. This is now possible with ALMA through observations of CO isotopologues and tracers of freezeout. Class 0 sources are ideal for such studies given their almost intact envelope and young disk.