Emission from protostars at centimeter radio wavelengths has been shown to trace the free-free emission arising from ionizing shocks as a result of jets and outflows driven by protostars. Therefore, measuring properties of protostars at radio frequencies can provide valuable insights into the nature of their outflows and jets. We present a C-band (4.1 and 6.4cm) survey of all known protostars (Class0 and ClassI) in Perseus as part of the VLA Nascent Disk and Multiplicity (VANDAM) Survey. We examine the known correlations between radio flux density and protostellar parameters, such as bolometric luminosity and outflow force, for our sample. We also investigate the relationship between radio flux density and far-infrared line luminosities from Herschel. We show that free-free emission most likely originates from J-type shocks; however, the large scatter indicates that those two types of emission probe different time and spatial scales. Using C-band fluxes, we removed an estimation of free-free contamination from the corresponding Ka- band (9mm) flux densities that primarily probe dust emission from embedded disks. We find that the compact (<1") dust emission is lower for Class I sources (median dust mass 96M_{Earth}) relative to Class 0 (248M{Earth}), but several times higher than in Class II (5-15M{Earth}_). If this compact dust emission is tracing primarily the embedded disk, as is likely for many sources, this result provides evidence of decreasing disk masses with protostellar evolution, with sufficient mass for forming giant planet cores primarily at early times.

Cone search capability for table J/ApJS/238/19/table4 (Young stellar object candidates)

Cone search capability for table J/ApJS/238/19/table5 (Known non-protostellar sources)

Cone search capability for table J/ApJS/238/19/table1 (Protostars of the VLA Nascent Disk and Multiplicity (VANDAM) survey)

Cone search capability for table J/ApJS/238/19/protostars (C-band observation results (table 3) and disk masses (table 10) for the protostars of table 1)

Cone search capability for table J/ApJS/238/19/table6 (New detections reported in Pech+ (2016, J/ApJ/818/116))

Cone search capability for table J/ApJS/238/19/table7 (New detections from VANDAM survey)