THE PDS 66 CIRCUMSTELLAR DISK AS SEEN in POLARIZED LIGHT with the GEMINI PLANET IMAGER

Schuyler G. Wolff, Marshall Perrin, Maxwell A. Millar-Blanchaer, Eric L. Nielsen, Jason Wang, Andrew Cardwell, Jeffrey Chilcote, Ruobing Dong, Zachary H. Draper, Gaspard Duchěne, Michael P. Fitzgerald, Stephen J. Goodsell, Carol A. Grady, James R. Graham, Alexandra Z. Greenbaum, Markus Hartung, Pascale Hibon, Dean C. Hines, Li Wei Hung, Paul KalasBruce Macintosh, Franck Marchis, Christian Marois, Laurent Pueyo, Fredrik T. Rantakyrö, Glenn Schneider, Anand Sivaramakrishnan, Sloane J. Wiktorowicz

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We present H- and K-band imaging polarimetry for the PDS 66 circumstellar disk obtained during the commissioning of the Gemini Planet Imager (GPI). Polarization images reveal a clear detection of the disk in to the 0.″12 inner working angle (IWA) in the H band, almost three times closer to the star than the previous Hubble Space Telescope (HST) observations with NICMOS and STIS (0.″35 effective IWA). The centro-symmetric polarization vectors confirm that the bright inner disk detection is due to circumstellar scattered light. A more diffuse disk extends to a bright outer ring centered at 80 AU. We discuss several physical mechanisms capable of producing the observed ring + gap structure. GPI data confirm enhanced scattering on the east side of the disk that is inferred to be nearer to us. We also detect a lateral asymmetry in the south possibly due to shadowing from material within the IWA. This likely corresponds to a temporally variable azimuthal asymmetry observed in HST/STIS coronagraphic imaging.

Original languageEnglish (US)
Article numberL15
JournalAstrophysical Journal Letters
Volume818
Issue number1
DOIs
StatePublished - Feb 10 2016

Keywords

  • instrumentation: adaptive optics
  • protoplanetary disks
  • stars: individual (PDS 66)
  • techniques: high angular resolution
  • techniques: polarimetric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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