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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 606295.0, MPI für Astronomie / Publikationen_mpia
Direct imaging of fine structures in giant planet-forming regions of the protoplanetary disk around AB Aurigae
Authors:Hashimoto, J.; Tamura, M.; Muto, T.; Kudo, T.; Fukagawa, M.; Fukue, T.; Goto, M.; Grady, C. A.; Henning, T.; Hodapp, K.; Honda, M.; Inutsuka, S.; Kokubo, E.; Knapp, G.; McElwain, M. W.; Momose, M.; Ohashi, N.; Okamoto, Y. K.; Takami, M.; Turner, E. L.; Wisniewski, J.; Janson, M.; Abe, L.; Brandner, W.; Carson, J.; Egner, S.; Feldt, M.; Golota, T.; Guyon, O.; Hayano, Y.; Hayashi, M.; Hayashi, S.; Ishii, M.; Kandori, R.; Kusakabe, N.; Matsuo, T.; Mayama, S.; Miyama, S.; Morino, J. I.; Moro-Martin, A.; Nishimura, T.; Pyo, T. S.; Suto, H.; Suzuki, R.; Takato, N.; Terada, H.; Thalmann, C.; Tomono, D.; Watanabe, M.; Yamada, T.; Takami, H.; Usuda, T.
Date of Publication (YYYY-MM-DD):2011
Journal Abbrev.:The Astrophysical Journal Letters
Issue / Number:2
Start Page:id. L17
Audience:Not Specified
Abstract / Description:We report high-resolution 1.6 μm polarized intensity (PI) images of the circumstellar disk around the Herbig Ae star AB Aur at a radial distance of 22 AU (0farcs15) up to 554 AU (3farcs85), which have been obtained by the high-contrast instrument HiCIAO with the dual-beam polarimetry. We revealed complicated and asymmetrical structures in the inner part (lsim140 AU) of the disk while confirming the previously reported outer (r >~ 200 AU) spiral structure. We have imaged a double ring structure at ~40 and ~100 AU and a ring-like gap between the two. We found a significant discrepancy of inclination angles between two rings, which may indicate that the disk of AB Aur is warped. Furthermore, we found seven dips (the typical size is ~45 AU or less) within two rings, as well as three prominent PI peaks at ~40 AU. The observed structures, including a bumpy double ring, a ring-like gap, and a warped disk in the innermost regions, provide essential information for understanding the formation mechanism of recently detected wide-orbit (r > 20 AU) planets. Based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan.
Free Keywords:planetary systems; polarization; protoplanetary disks; stars: individual: AB Aurigae; stars: pre-main sequence
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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