Investigating the Baryon Cycle in Interacting Dwarfs with the Very Large
  Array and Pan-STARRS
  We present resolved HI synthesis maps from the Very Large Array (VLA) of
three interacting dwarf systems: the NGC 3664 dwarf pair, the NGC 3264 dwarf
pair, and the UGC 4638 dwarf triplet. All three dwarf systems are captured at
various stages of interaction and span a range of environments. We detect clear
hallmarks of tidal interactions through the presence of HI bridges, and diffuse
HI extensions that surround the dwarfs. We overlay the HI data on Pan-STARRS
r-band images and find further evidence of tidal interactions through
coincident distorted HI and tidal stellar features in NGC 3264 and UGC 4638,
and an unwound spiral arm pointing towards its smaller companion in NGC 3264.
In UGC 4638, both the gas and diffuse stars are extended to similar radii east
of the primary, which could indicate that the smaller dwarf in the system has
already completed one pass through the primary. We additionally find that our
three systems, and those from the Local Volume TiNy Titans survey, are not HI
deficient and thus the interaction has not resulted in a loss of gas from the
systems. A comparison with non-interacting dwarf galaxies shows that the
interactions have a significant impact on the kinematics of the systems. Our
new resolved HI kinematics, combined with detailed stellar and HI morphologies,
provide crucial constraints for future dynamical modelling of hierarchical
mergers and the baryon cycle at the low-mass scale.
