  There is substantial evidence for disk formation taking place during the
early stages of star formation and for most stars being born in multiple
systems; however, protostellar multiplicity and disk searches have been
hampered by low resolution, sample bias, and variable sensitivity. We have
conducted an unbiased, high-sensitivity Karl G. Jansky Very Large Array (VLA)
survey toward all known protostars (n = 94) in the Perseus molecular cloud
(d~230 pc), with a resolution of ~15 AU (0.06") at 8 mm. We have detected
candidate protostellar disks toward 17 sources (with 12 of those in the Class 0
stage) and we have found substructure on < 50AU scales for three Class 0 disk
candidates, possibly evidence for disk fragmentation. We have discovered 16 new
multiple systems (or new components) in this survey; the new systems have
separations < 500 AU and 3 by < 30 AU. We also found a bi-modal distribution of
separations, with peaks at ~75 AU and ~3000 AU, suggestive of formation through
two distinct mechanisms: disk and turbulent fragmentation. The results from
this survey demonstrate the necessity and utility of uniform, unbiased surveys
of protostellar systems at millimeter and centimeter wavelengths.
