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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 709742.0, MPI für Astronomie / Publikationen_mpia
Surface geometry of protoplanetary disks inferred from near-infrared imaging polarimetry
Authors:Takami, M.; Hasegawa, Y.; Muto, T.; Gu, P.-G.; Dong, R.; Karr, J. L.; Hashimoto, J.; Kusakabe, N.; Chapillon, E.; Tang, Y.-W.; Itoh, Y.; Carson, J.; Follette, K. B.; Mayama, S.; Sitko, M.; Janson, M.; Grady, C. A.; Kudo, T.; Akiyama, E.; Kwon, J.; Takahashi, Y.; Suenaga, T.; Abe, L.; Brandner, W.; Brandt, T. D.; Currie, T.; Egner, S. E.; Feldt, M.; Guyon, O.; Hayano, Y.; Hayashi, M.; Hayashi, S.; Henning, T.; Hodapp, K. W.; Honda, M.; Ishii, M.; Iye, M.; Kandori, R.; Knapp, G. R.; Kuzuhara, M.; McElwain, M. W.; Matsuo, T.; Miyama, S.; Morino, J.-I.; Moro-Martin, A.; Nishimura, T.; Pyo, T.-S.; Serabyn, E.; Suto, H.; Suzuki, R.; Takato, N.; Terada, H.; Thalmann, C.; Tomono, D.; Turner, E. L.; Wisniewski, J. P.; Watanabe, M.; Yamada, T.; Takami, H.; Usuda, T.; Tamura, M.
Date of Publication (YYYY-MM-DD):2014
Title of Journal:The Astrophysical Journal
Volume:795
Issue / Number:1
Start Page:id. 71 (21 pp)
Audience:Not Specified
Abstract / Description:We present a new method of analysis for determining the surface geometry of five protoplanetary disks observed with near-infrared imaging polarimetry using Subaru-HiCIAO. Using as inputs the observed distribution of polarized intensity (PI), disk inclination, assumed properties for dust scattering, and other reasonable approximations, we calculate a differential equation to derive the surface geometry. This equation is numerically integrated along the distance from the star at a given position angle. We show that, using these approximations, the local maxima in the PI distribution of spiral arms (SAO 206462, MWC 758) and rings (2MASS J16042165-2130284, PDS 70) are associated with local concave-up structures on the disk surface. We also show that the observed presence of an inner gap in scattered light still allows the possibility of a disk surface that is parallel to the light path from the star, or a disk that is shadowed by structures in the inner radii. Our analysis for rings does not show the presence of a vertical inner wall as often assumed in studies of disks with an inner gap. Finally, we summarize the implications of spiral and ring structures as potential signatures of ongoing planet formation. Based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan.
Free Keywords:polarization; protoplanetary disks; stars: individual: SAO 206462 MWC 758 2MASS J16042165--2130284 PDS 70 MWC 480; stars: pre-main sequence
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X %R 10.1088/0004-637X/795/1/71
URL:http://adsabs.harvard.edu/abs/2014ApJ...795...71T
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