Multiple Stellar Fly-Bys Sculpting the Circumstellar Architecture in RW Aurigae
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Abstract
We present high-resolution ALMA Band 6 and 7 observations of the tidally
disrupted protoplanetary disks of the RW Aurigae binary. Our observations
reveal the presence of additional tidal streams to the previously observed
tidal arm around RW Aur A. The observed configuration of tidal streams
surrounding RW Aur A and B is incompatible with a single star--disk tidal
encounter, suggesting that the RW Aurigae system has undergone multiple fly-by
interactions. We also resolve the circumstellar disks around RW Aur A and B,
with CO radii of 58 au and 38 au consistent with tidal truncation, and 2.5
times smaller dust emission radii. The disks appear misaligned by 12
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Science and Technology Facilities Council (ST/N000927/1)