GW Ori: Interactions Between a Triple-star System and its Circumtriple Disk in Action. (arXiv:2004.03135v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Bi_J/0/1/0/all/0/1">Jiaqing Bi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Marel_N/0/1/0/all/0/1">Nienke van der Marel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dong_R/0/1/0/all/0/1">Ruobing Dong</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Muto_T/0/1/0/all/0/1">Takayuki Muto</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Martin_R/0/1/0/all/0/1">Rebecca G. Martin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Smallwood_J/0/1/0/all/0/1">Jeremy L. Smallwood</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hashimoto_J/0/1/0/all/0/1">Jun Hashimoto</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Liu_H/0/1/0/all/0/1">Hauyu Baobab Liu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nomura_H/0/1/0/all/0/1">Hideko Nomura</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hasegawa_Y/0/1/0/all/0/1">Yasuhiro Hasegawa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Takami_M/0/1/0/all/0/1">Michihiro Takami</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Konishi_M/0/1/0/all/0/1">Mihoko Konishi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Momose_M/0/1/0/all/0/1">Munetake Momose</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kanagawa_K/0/1/0/all/0/1">Kazuhiro D. Kanagawa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kataoka_A/0/1/0/all/0/1">Akimasa Kataoka</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ono_T/0/1/0/all/0/1">Tomohiro Ono</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sitko_M/0/1/0/all/0/1">Michael L. Sitko</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Takahashi_S/0/1/0/all/0/1">Sanemichi Z. Takahashi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tomida_K/0/1/0/all/0/1">Kengo Tomida</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tsukagoshi_T/0/1/0/all/0/1">Takashi Tsukagoshi</a>

GW Ori is a hierarchical triple system which has a rare circumtriple disk. We
present Atacama Large Millimeter/submillimeter Array (ALMA) observations of 1.3
mm dust continuum and 12CO J=2-1 molecular gas emission of the disk. For the
first time, we identify three dust rings in the disk at ~46, 188, and 338 AU,
with estimated dust mass of ~70-250 Earth mass, respectively. To our knowledge,
the outer ring in GW Ori is the largest dust ring ever found in protoplanetary
disks. We use visibility modelling of dust continuum to show that the disk has
misaligned parts and the innermost dust ring is eccentric. The disk
misalignment is also suggested by the CO kinematics modelling. We interpret
these substructures as evidence of ongoing dynamical interactions between the
triple stars and the circumtriple disk.

GW Ori is a hierarchical triple system which has a rare circumtriple disk. We
present Atacama Large Millimeter/submillimeter Array (ALMA) observations of 1.3
mm dust continuum and 12CO J=2-1 molecular gas emission of the disk. For the
first time, we identify three dust rings in the disk at ~46, 188, and 338 AU,
with estimated dust mass of ~70-250 Earth mass, respectively. To our knowledge,
the outer ring in GW Ori is the largest dust ring ever found in protoplanetary
disks. We use visibility modelling of dust continuum to show that the disk has
misaligned parts and the innermost dust ring is eccentric. The disk
misalignment is also suggested by the CO kinematics modelling. We interpret
these substructures as evidence of ongoing dynamical interactions between the
triple stars and the circumtriple disk.

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