GW Ori: Interactions between a triple-star system and its circumtriple disk in action

Jiaqing Bi; Nienke van der Marel; Ruobing Dong; Takayuki Muto; Rebecca G. Martin; Jeremy L. Smallwood; Jun Hashimoto; Hauyu Baobab Liu; Hideko Nomura; Yasuhiro Hasegawa; Michihiro Takami; Mihoko Konishi; Munetake Momose; Kazuhiro D. Kanagawa; Akimasa Kataoka; Tomohiro Ono; Michael L. Sitko; Sanemichi Z. Takahashi; Kengo Tomida; Takashi Tsukagoshi

GW Ori: Interactions between a triple-star system and its circumtriple disk in action

Jiaqing Bi, Nienke van der Marel, Ruobing Dong, Takayuki Muto, Rebecca G. Martin, Jeremy L. Smallwood, Jun Hashimoto, Hauyu Baobab Liu, Hideko Nomura, Yasuhiro Hasegawa, Michihiro Takami, Mihoko Konishi, Munetake Momose, Kazuhiro D. Kanagawa, Akimasa Kataoka, Tomohiro Ono, Michael L. Sitko, Sanemichi Z. Takahashi, Kengo Tomida, Takashi Tsukagoshi

SCI - Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

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 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. We interpret these substructures as evidence of ongoing dynamical interactions between the triple stars and the circumtriple disk.

Original language	English
Journal	Unknown Journal
Publication status	Published - 2020 Apr 7

Keywords

Planet-disk interactions
Planets
Protoplanetary disks
Satellites: formation

ASJC Scopus subject areas

General

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Bi, J., van der Marel, N., Dong, R., Muto, T., Martin, R. G., Smallwood, J. L., Hashimoto, J., Liu, H. B., Nomura, H., Hasegawa, Y., Takami, M., Konishi, M., Momose, M., Kanagawa, K. D., Kataoka, A., Ono, T., Sitko, M. L., Takahashi, S. Z., Tomida, K., & Tsukagoshi, T. (2020). GW Ori: Interactions between a triple-star system and its circumtriple disk in action. Unknown Journal.

GW Ori : Interactions between a triple-star system and its circumtriple disk in action. / Bi, Jiaqing; van der Marel, Nienke; Dong, Ruobing; Muto, Takayuki; Martin, Rebecca G.; Smallwood, Jeremy L.; Hashimoto, Jun; Liu, Hauyu Baobab; Nomura, Hideko; Hasegawa, Yasuhiro; Takami, Michihiro; Konishi, Mihoko; Momose, Munetake; Kanagawa, Kazuhiro D.; Kataoka, Akimasa; Ono, Tomohiro; Sitko, Michael L.; Takahashi, Sanemichi Z.; Tomida, Kengo; Tsukagoshi, Takashi.

In: Unknown Journal, 07.04.2020.

Research output: Contribution to journal › Article › peer-review

Bi, Jiaqing ; van der Marel, Nienke ; Dong, Ruobing ; Muto, Takayuki ; Martin, Rebecca G. ; Smallwood, Jeremy L. ; Hashimoto, Jun ; Liu, Hauyu Baobab ; Nomura, Hideko ; Hasegawa, Yasuhiro ; Takami, Michihiro ; Konishi, Mihoko ; Momose, Munetake ; Kanagawa, Kazuhiro D. ; Kataoka, Akimasa ; Ono, Tomohiro ; Sitko, Michael L. ; Takahashi, Sanemichi Z. ; Tomida, Kengo ; Tsukagoshi, Takashi. / GW Ori : Interactions between a triple-star system and its circumtriple disk in action. In: Unknown Journal. 2020.

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abstract = "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 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. We interpret these substructures as evidence of ongoing dynamical interactions between the triple stars and the circumtriple disk.",

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author = "Jiaqing Bi and {van der Marel}, Nienke and Ruobing Dong and Takayuki Muto and Martin, {Rebecca G.} and Smallwood, {Jeremy L.} and Jun Hashimoto and Liu, {Hauyu Baobab} and Hideko Nomura and Yasuhiro Hasegawa and Michihiro Takami and Mihoko Konishi and Munetake Momose and Kanagawa, {Kazuhiro D.} and Akimasa Kataoka and Tomohiro Ono and Sitko, {Michael L.} and Takahashi, {Sanemichi Z.} and Kengo Tomida and Takashi Tsukagoshi",

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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

PY - 2020/4/7

Y1 - 2020/4/7

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 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. 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 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. We interpret these substructures as evidence of ongoing dynamical interactions between the triple stars and the circumtriple disk.

KW - Planet-disk interactions

KW - Planets

KW - Protoplanetary disks

KW - Satellites: formation

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