Strongly misaligned triple system in SR 24 revealed by ALMA
  We report the detection of the 1.3 mm continuum and the molecular emission of
the disks of the young triple system SR24 by analyzing ALMA (The Atacama Large
Millimeter/Submillimter Array) subarcsecond archival observations. We estimate
the mass of the disks (0.025 solar masses and 4E-5 earth masses for SR24S and
SR24N, respectively) and the dynamical mass of the protostars (1.5 and 1.1
solar masses). A kinematic model of the SR24S disk to fit its C18O (2-1)
emission allows us to develop an observational method to learn what is the tilt
of a rotating and accreting disk. We derive the size, the inclination, the
position angle and the sense of rotation of each disk, finding that they are
strongly misaligned (108 degrees) and possibly rotate in opposite directions as
seen from Earth, in projection. We compare the ALMA observations with 12CO SMA
archival observations, which are more sensitive to extended structures. We find
three extended structures and estimate their masses: a molecular bridge joining
the disks of the system, a molecular gas reservoir associated with SR24N and a
gas streamer associated with SR24S. Finally we discuss on the possible origin
of the misaligned SR24 system, pointing out that a closer inspection of the
northern gas reservoir is needed to better understand it.
