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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 709880.0, MPI für Astronomie / Publikationen_mpia
Visible Light Adaptive Optics Imaging of the Orion 218-354 Silhouette Disk
Authors:Follette, K. B.; Close, L. M.; Males, J. R.; Kopon, D.; Wu, Y.-L.; Morzinski, K. M.; Hinz, P.; Rodigas, T. J.; Puglisi, A.; Esposito, S.; Riccardi, A.; Pinna, E.; Xompero, M.; Briguglio, R.; Matthews, B. C.; Graham, J. R.
Place of Publication:Cambridge
Publisher:Cambridge Univ. Press
Date of Publication (YYYY-MM-DD):2014
Audience:Not Specified
Abstract / Description:We present the first ground-based adaptive optics images of a silhouette disk. This disk, Orion 218-354, is seen in silhouette against the bright nebular background of Orion, and was resolved using the new Magellan Adaptive Secondary AO system and its VisAO camera in Simultaneous Differential Imaging (SDI) mode. PSF subtraction of Orion 218-354 reveals a disk ~1'' (400 AU) in radius, with the degree of absorption increasing steadily towards the center of the disk. By virtue of the central star being unsaturated, these data probe inward to a much smaller radius than previous HST images. Our data present a different picture than previous observers had hypothesized, namely that the disk is likely optically thin at Halpha at least as far inward as ~20AU. In addition to being among the first high-resolution AO images taken in the optical on a large telescope, these data reveal the power of SDI imaging to illuminate disk structure, and speak to a bright future for visible
Free Keywords:Instrumentation: Adaptive Optics; Planetary Systems: Protoplanetary Disks
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
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