SUBARU Near-Infrared Imaging Polarimetry of Misaligned Disks Around The SR24 Hierarchical Triple System
Creators: name: Mayama, Satoshi
name: Pérez, Sebastián
name: Kusakabe, Nobuhiko
name: Muto, Takayuki
name: Tsukagoshi, Takashi
name: Sitko, Michael L.
name: Takami, Michihiro
name: Hashimoto, Jun
name: Dong, Ruobing
name: Kwon, Jungmi
name: Hayashi, Saeko S.
name: Kudo, Tomoyuki
name: Kuzuhara, Masayuki
name: Follette, Kate B.
name: Fukagawa, Misato
name: Momose, Munetake
name: Oh, Daehyeon
name: De Leon, Jerome
name: Akiyama, Eiji
name: Wisniewski, John P.
name: Yang, Yi
name: Abe, Lyu
name: Brandner, Wolfgang
name: Brandt, Timothy D.
name: Bonnefoy, Michael
name: Carson, Joseph C.
name: Chilcote, Jeffrey
name: Currie, Thayne
name: Feldt, Markus
name: Goto, Miwa
name: Groff, Tyler
name: Guyon, Olivier
name: Hayano, Yutaka
name: Hayashi, Masahiko
name: Henning, Thomas
name: Hodapp, Klaus W.
name: Ishii, Miki
name: Iye, Masanori
name: Janson, Markus
name: Jovanovic, Nemanja
name: Kandori, Ryo
name: Kasdin, Jeremy
name: Knapp, Gillian R.
name: Lozi, Julien
name: Martinache, Frantz
name: Matsuo, Taro
name: Mcelwain, Michael W.
name: Miyama, Shoken
name: Morino, Jun-ichi
name: Moro-martin, Amaya
name: Nakagawa, Takao
name: Nishimura, Tetsuo
name: Pyo, Tae-soo
name: Rich, Evan A.
name: Serabyn, Eugene
name: Suto, Hiroshi
name: Suzuki, Ryuji
name: Takato, Naruhisa
name: Terada, Hiroshi
name: Thalmann, Christian
name: Tomono, Daigo
name: Turner, Edwin L.
name: Watanabe, Makoto
name: Yamada, Toru
name: Takami, Hideki
name: Usuda, Tomonori
name: Uyama, Taichi
name: Tamura, Motohide
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The SR24 multi-star system hosts both circumprimary and circumsecondary disks, which are strongly misaligned from each other. The circumsecondary disk is circumbinary in nature. Interestingly, both disks are interacting, and they possibly rotate in opposite directions. To investigate the nature of this unique twin disk system, we present 0.''1 resolution near-infrared polarized intensity images of the circumstellar structures around SR24, obtained with HiCIAO mounted on the Subaru 8.2 m telescope. Both the circumprimary disk and the circumsecondary disk are resolved and have elongated features. While the position angle of the major axis and radius of the NIR polarization disk around SR24S are 55$^{\circ}$ and 137 au, respectively, those around SR24N are 110$^{\circ}$ and 34 au, respectively. With regard to overall morphology, the circumprimary disk around SR24S shows strong asymmetry, whereas the circumsecondary disk around SR24N shows relatively strong symmetry. Our NIR observations confirm the previous claim that the circumprimary and circumsecondary disks are misaligned from each other. Both the circumprimary and circumsecondary disks show similar structures in $^{12}$CO observations in terms of its size and elongation direction. This consistency is because both NIR and $^{12}$CO are tracing surface layers of the flared disks. As the radius of the polarization disk around SR24N is roughly consistent with the size of the outer Roche lobe, it is natural to interpret the polarization disk around SR24N as a circumbinary disk surrounding the SR24Nb-Nc system.
description: 14 pages, 5 figures, accepted for publication in AJ