SUBARU Near-Infrared Imaging Polarimetry of Misaligned Disks Around The
  SR24 Hierarchical Triple System
  The SR24 multi-star system hosts both circumprimary and circumsecondary
disks, which are strongly misaligned from each other. The circumsecondary disk
is circumbinary in nature. Interestingly, both disks are interacting, and they
possibly rotate in opposite directions. To investigate the nature of this
unique twin disk system, we present 0.''1 resolution near-infrared polarized
intensity images of the circumstellar structures around SR24, obtained with
HiCIAO mounted on the Subaru 8.2 m telescope. Both the circumprimary disk and
the circumsecondary disk are resolved and have elongated features. While the
position angle of the major axis and radius of the NIR polarization disk around
SR24S are 55$^{\circ}$ and 137 au, respectively, those around SR24N are
110$^{\circ}$ and 34 au, respectively. With regard to overall morphology, the
circumprimary disk around SR24S shows strong asymmetry, whereas the
circumsecondary disk around SR24N shows relatively strong symmetry. Our NIR
observations confirm the previous claim that the circumprimary and
circumsecondary disks are misaligned from each other. Both the circumprimary
and circumsecondary disks show similar structures in $^{12}$CO observations in
terms of its size and elongation direction. This consistency is because both
NIR and $^{12}$CO are tracing surface layers of the flared disks. As the radius
of the polarization disk around SR24N is roughly consistent with the size of
the outer Roche lobe, it is natural to interpret the polarization disk around
SR24N as a circumbinary disk surrounding the SR24Nb-Nc system.
