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Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO

Follette, Katherine B. and Millar-Blanchaer, Maxwell A. and Wallace, J. Kent (2017) Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO. Astronomical Journal, 153 (6). Art. No. 264. ISSN 0004-6256. doi:10.3847/1538-3881/aa6d85.

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We present optical and near-infrared high-contrast images of the transitional disk HD 100546 taken with the Magellan Adaptive Optics system (MagAO) and the Gemini Planet Imager (GPI). GPI data include both polarized intensity and total intensity imagery, and MagAO data are taken in Simultaneous Differential Imaging mode at Hα. The new GPI H-band total intensity data represent a significant enhancement in sensitivity and field rotation compared to previous data sets and enable a detailed exploration of substructure in the disk. The data are processed with a variety of differential imaging techniques (polarized, angular, reference, and simultaneous differential imaging) in an attempt to identify the disk structures that are most consistent across wavelengths, processing techniques, and algorithmic parameters. The inner disk cavity at 15 au is clearly resolved in multiple data sets, as are a variety of spiral features. While the cavity and spiral structures are identified at levels significantly distinct from the neighboring regions of the disk under several algorithms and with a range of algorithmic parameters, emission at the location of HD 100546 "c" varies from point-like under aggressive algorithmic parameters to a smooth continuous structure with conservative parameters, and is consistent with disk emission. Features identified in the HD 100546 disk bear qualitative similarity to computational models of a moderately inclined two-armed spiral disk, where projection effects and wrapping of the spiral arms around the star result in a number of truncated spiral features in forward-modeled images.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Millar-Blanchaer, Maxwell A.0000-0001-6205-9233
Additional Information:© 2017 The American Astronomical Society. Received 2016 December 28. Accepted 2017 April 13. Published 2017 May 22. Based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina), and Ministério da Ciência, Tecnologia e Inovação (Brazil). K.B.F. and J.F.'s work was performed in part under contract with the California Institute of Technology (Caltech)/Jet Propulsion Laboratory (JPL) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. K.B.F. and B.M.'s work was supported by NSF AST-1411868. Portions of this work were performed under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. K.M.M., T.B., and L.M.C.'s work is supported by the NASA Exoplanets Research Program (XRP) by cooperative agreement NNX16AD44G. J.R.G., R.D.R., P.K., J.W., V.B., and other members of the GPIES team are supported by NASA grant number NNX15AD95G. Support for M.M.B.'s work was provided by NASA through Hubble Fellowship grant 51378.01-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. Facilities: Gemini:South (GPI) and Magellan:Clay (MagAO) -
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NASA Exoplanet Science InstituteUNSPECIFIED
Department of Energy (DOE)DE-AC52-07NA27344
NASA Hubble Fellowship51378.01-A
Subject Keywords:instrumentation: adaptive optics – planet–disk interaction – protoplanetary disk – stars: individual (HD 100546)
Issue or Number:6
Record Number:CaltechAUTHORS:20170522-095217310
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Official Citation:Katherine B. Follette et al 2017 AJ 153 264
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77625
Deposited By: Ruth Sustaita
Deposited On:22 May 2017 18:32
Last Modified:15 Nov 2021 17:32

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