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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 720280.0, MPI für Astronomie / Publikationen_mpia
Near-IR high-resolution imaging polarimetry of the SU Aur disk: Clues for tidal tails?
Authors:de Leon, J.; Takami, M.; Karr, J. L.; Hashimoto, J.; Kudo, T.; Sitko, M.; Mayama, S.; Kusakabe, N.; Akiyama, E.; Liu, H. B.; Usuda, T.; Abe, L.; Brandner, W.; Brandt, T. D.; Carson, J.; Currie, T.; Egner, S. E.; Feldt, M.; Follette, K.; Grady, C. A.; Goto, M.; Guyon, O.; Hayano, Y.; Hayashi, M.; Hayashi, S.; Henning, T.; Hodapp, K. W.; Ishii, M.; Iye, M.; Janson, M.; Kandori, R.; Knapp, G. R.; Kuzuhara, M.; Kwon, J.; Matsuo, T.; McElwain, M. W.; Miyama, S.; Morino, J.-I.; Moro-Martin, A.; Nishimura, T.; Pyo, T.-S.; Serabyn, E.; Suenaga, T.; Suto, H.; Suzuki, R.; Takahashi, Y.; Takato, N.; Terada, H.; Thalmann, C.; Tomono, D.; Turner, E. L.; Watanabe, M.; Wisniewski, J. P.; Yamada, T.; Takami, H.; Tamura, M.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:The Astrophysical Journal Letters
Volume:806
Issue / Number:1
Start Page:id. L10 (6 pp)
Audience:Not Specified
Abstract / Description:We present new high-resolution (∼ 0\buildrel{\prime\prime}\over{.} 09) H-band imaging observations of the circumstellar disk around the T Tauri star SU Aur. Our observations with Subaru-HiCIAO have revealed the presence of scattered light as close as 0.″ 15 (∼20 AU) to the star. Within our image, we identify bright emission associated with a disk with a minimum radius of ∼90 AU, an inclination of ∼35° from the plane of the sky, and an approximate PA of 15{}^\circ for the major axis. We find a brightness asymmetry between the northern and southern sides of the disk due to a non-axisymmetric disk structure. We also identify a pair of asymmetric tail structures extending east and west from the disk. The western tail extends at least 2.″ 5 (350 AU) from the star, and is probably associated with a reflection nebula previously observed at optical and near-IR wavelengths. The eastern tail extends at least 1″ (140 AU) at the present signal-to-noise. These tails are likely due to an encounter with an unseen brown dwarf, but our results do not exclude the explanation that these tails are outflow cavities or jets. Based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan.
Free Keywords:polarization; protoplanetary disks; stars: individual: SU Aur; stars: pre-main sequence
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X
URL:http://cdsads.u-strasbg.fr/abs/2015ApJ...806L..10D
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