Bi, Jiaqing and van der Marel, Nienke and Dong, Ruobing and Muto, Takayuki and Martin, Rebecca G. and Smallwood, Jeremy L. and Hashimoto, Jun and Liu, Hauyu Baobab and Nomura, Hideko and Hasegawa, Yasuhiro and Takami, Michihiro and Konishi, Mihoko and Momose, Munetake and Kanagawa, Kazuhiro D. and Kataoka, Akimasa and Ono, Tomohiro and Sitko, Michael L. and Takahashi, Sanemichi Z. and Tomida, Kengo and Tsukagoshi, Takashi (2020) GW Ori: Interactions between a Triple-star System and Its Circumtriple Disk in Action. The Astrophysical Journal Letters, 895 (1). L18. ISSN 2041-8205
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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 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.
Item Type: | Article |
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Subjects: | OA Open Library > Physics and Astronomy |
Depositing User: | Unnamed user with email support@oaopenlibrary.com |
Date Deposited: | 26 May 2023 06:14 |
Last Modified: | 30 Jan 2024 06:23 |
URI: | http://archive.sdpublishers.com/id/eprint/860 |