The PDS 66 circumstellar disk as seen in polarized light with the Gemini Planet Image

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DOIResolve DOI: http://doi.org/10.3847/2041-8205/818/1/L15
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TypeArticle
Journal titleThe Astrophysical Journal Letters
ISSN2041-8205
Volume818
Issue1
Article numberL15
AbstractWe 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.
Publication date
PublisherIOp Publishing
LanguageEnglish
AffiliationNational Research Council Canada; National Science Infrastructure
Peer reviewedYes
NPARC number21277507
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Record identifierec0a24de-45b2-4c21-a731-02ce1cb818b6
Record created2016-03-09
Record modified2016-07-18
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