TY - JOUR
T1 - GW Ori
T2 - Interactions between a Triple-star System and Its Circumtriple Disk in Action
AU - Bi, Jiaqing
AU - Van Der Marel, Nienke
AU - Dong, Ruobing
AU - Muto, Takayuki
AU - Martin, Rebecca G.
AU - Smallwood, Jeremy L.
AU - Hashimoto, Jun
AU - Liu, Hauyu Baobab
AU - Nomura, Hideko
AU - Hasegawa, Yasuhiro
AU - Takami, Michihiro
AU - Konishi, Mihoko
AU - Momose, Munetake
AU - Kanagawa, Kazuhiro D.
AU - Kataoka, Akimasa
AU - Ono, Tomohiro
AU - Sitko, Michael L.
AU - Takahashi, Sanemichi Z.
AU - Tomida, Kengo
AU - Tsukagoshi, Takashi
N1 - Publisher Copyright:
© 2020 The American Astronomical Society.
PY - 2020/5/20
Y1 - 2020/5/20
N2 - GW Ori is a hierarchical triple system with 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 GW Ori disk at ∼46, 188, and 338 au, with estimated dust mass of 74, 168, and 245 Earth masses, respectively. To our knowledge, its outermost ring is the largest dust ring ever found in protoplanetary disks. We use visibility modeling 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. We interpret these substructures as evidence of ongoing dynamical interactions between the triple stars and the circumtriple disk.
AB - GW Ori is a hierarchical triple system with 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 GW Ori disk at ∼46, 188, and 338 au, with estimated dust mass of 74, 168, and 245 Earth masses, respectively. To our knowledge, its outermost ring is the largest dust ring ever found in protoplanetary disks. We use visibility modeling 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. We interpret these substructures as evidence of ongoing dynamical interactions between the triple stars and the circumtriple disk.
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U2 - 10.3847/2041-8213/ab8eb4
DO - 10.3847/2041-8213/ab8eb4
M3 - Article
AN - SCOPUS:85085872087
SN - 2041-8205
VL - 895
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
M1 - L18
ER -