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Polarimetric Imaging of Large Cavity Structures in the Pre-transitional Protoplanetary Disk Around PDS 70: Observations of the DiskWe present high resolution H-band polarized intensity (PI; FWHM = 0."1: 14 AU) and L'-band imaging data (FWHM = 0."11: 15 AU) of the circumstellar disk around the weak-lined T Tauri star PDS 70 in Centaurus at a radial distance of 28 AU (0."2) up to 210 AU (1."5). In both images, a giant inner gap is clearly resolved for the first time, and the radius of the gap is approx.70 AU. Our data show that the geometric center of the disk shifts by approx.6 AU toward the minor axis. We confirm that the brown dwarf companion candidate to the north of PDS 70 is a background star based on its proper motion. As a result of SED fitting by Monte Carlo radiative transfer modeling, we infer the existence of an optically thick inner disk at a few AU. Combining our observations and modeling, we classify the disk of PDS 70 as a pre-transitional disk. Furthermore, based on the analysis of L'-band imaging data, we put an upper limit mass of companions at approx.30 to approx.50MJ within the gap. Taking account of the presence of the large and sharp gap, we suggest that the gap could be formed by dynamical interactions of sub-stellar companions or multiple unseen giant planets in the gap. Subject headings: planetary systems - protoplanetary disks - stars: individual (PDS 70) - stars: pre-main sequence - polarization
Document ID
20130011727
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
External Source(s)
doi:10.1088/2041-8205/758/1/L19
Authors
Hashimoto, J. (National Astronomical Observatory Tokyo, Japan)
Dong, R. (Princeton Univ. NJ, United States)
Kudo, T. (Subaru Telescope Hilo, HI, United States)
Honda, M. (Kanagawa Univ. Japan)
Zhu, Z. (Princeton Univ. NJ, United States)
McClure, M. K. (Michigan Univ. Ann Arbor, MI, United States)
Muto, T. (Kogakuin Univ. Tokyo, Japan)
Wisniewski, J. (Washington Univ. Seattle, WA, United States)
Abe, L. (Universite de Nice-Sophia Antipolis France)
Brandner, W. (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)
Brandt, T. (Princeton Univ. NJ, United States)
Carson, J. (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)
Egner, S. (Subaru Telescope Hilo, HI, United States)
Feldt, M. (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)
Fukagawa, M. (Osaka Univ. Osaka, Japan)
Goto, M. (Universitaets-Sternwarte Munich, Germany)
Grady, C. A. (Eureka Scientific, Inc. Oakland, CA, United States)
Guyon, O. (Subaru Telescope Hilo, HI, United States)
Hayano, Y. (Subaru Telescope Hilo, HI, United States)
Hayashi, M. (National Astronomical Observatory Tokyo, Japan)
Hayashi, S. (Subaru Telescope Hilo, HI, United States)
Henning, T. (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)
Hodapp, K. (Hawaii Univ. Honolulu, HI, United States)
Ishii, M. (Subaru Telescope Hilo, HI, United States)
Iye, M. (National Astronomical Observatory Tokyo, Japan)
Janson, M. (Princeton Univ. Princeton, NJ, United States)
Kandori, R. (National Astronomical Observatory Tokyo, Japan)
Knapp, G. (Princeton Univ. Princeton, NJ, United States)
Kusakabe, N. (National Astronomical Observatory Tokyo, Japan)
Kuzuhara, M. (Tokyo Univ. Hongo, Japan)
Kwon, J. (Graduate Univ. for Advanced Studies (SOKENDAI) Tachikawa, Japan)
Matsuo, T. (Kyoto Univ. Japan)
Mayama, S. (Graduate Univ. for Advanced Studies Japan)
McElwain, M. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Serabyn, G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 27, 2013
Publication Date
September 24, 2012
Subject Category
Astronomy
Report/Patent Number
GSFC-E-DAA-TN7206
Funding Number(s)
CONTRACT_GRANT: NNG06EO90A
Distribution Limits
Public
Copyright
Public Use Permitted.

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