Gas infall and possible circumstellar rotation in R Leo
  We present new interferometer molecular observations of R Leo taken at 1.2 mm
with the Atacama Large Millimeter Array with an angular resolution up to ~0.026
arcsec. These observations permit us to resolve the innermost envelope of this
star revealing the existence of a complex structure that involves extended
continuum emission and molecular emission showing a non-radial gas velocity
distribution. This molecular emission displays prominent red-shifted
absorptions located right in front to the star typical of material infall and
lateral gas motions compatible with the presence of a torus-like structure.
