Outflows, envelopes, and disks as evolutionary indicators in Lupus YSOs
  By studying 7 objects in the Lupus clouds we aim to test if a coherence
exists between commonly used evolutionary tracers.
  We present ALMA observations of the continuum and molecular line emission
that probe the dense gas and dust of cores and their associated molecular
outflows. Our source selection in a common environment allows for a consistent
comparison across different evolutionary stages.
  The quality of the ALMA molecular data allows us to reveal the nature of the
molecular outflows by studying their morphology and kinematics. The images in
IRAS15398-3359 appear to show that it drives a precessing episodic jet-driven
outflow with at least 4 ejections separated by periods of time between 50 and
80 years, while data in IRAS16059-3857 show similarities with a wide-angle wind
model also showing signs of being episodic. The outflow of J160115-41523 could
be better explain with the wide-angle wind model as well, but new observations
are needed to explore its nature. We find that the most common evolutionary
tracers are useful for broad evolutionary classifications, but are not
consistent with each other to provide enough granularity to disentangle
different evolutionary stage of sources that belong to the same Class. Outflow
properties used as protostellar age tracers (mass, momentum, energy, opening
angle) may suffer from differences in the nature of each outflow, thus detailed
observations are needed to refine evolutionary classifications. We found both
AzTEC-lup1-2 and AzTEC-lup3-5 to be in the pre-stellar stage, although the
latter could be more evolved. IRAS15398-3359, IRAS16059-3857 and J160115-41523,
which have clearly detected outflows, are Class 0 sources, although we are not
able to determine which is younger and which is older. Sz102 and Merin28 are
the most evolved sources and show signs of having associated flows, not as well
traced by CO as for the younger sources.
