Discovery of a Nearly Edge-On Disk around the Young Fe Star PDS 453

Details Discovery of a Nearly Edge-On Disk around the Young Fe Star PDS 453 Discovery of a Nearly Edge-On Disk around the Young Fe Star PDS 453

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542812p&link_type=abstract

American Astronomical Society, AAS Meeting #215, #428.12; Bulletin of the American Astronomical Society, Vol. 42, p.346

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the first spatially-resolved imaging of a protoplanetary disk around PDS 453, a young F2e star intermediate in mass between T Tauri and Herbig Ae stars. Using Lick AO polarimetry and HST NICMOS coronagraphic imaging and polarimetry, we spatially resolve the disk in scattered light from 1-2 microns, achieving an angular resolution of 0.15" and an inner working angle of 0.3" (20 and 40 AU respectively, for an assumed distance of 140 pc). In addition we present spatially-unresolved Gemini T-ReCS mid-IR photometry. Our high-contrast imaging reveals a highly inclined disk (i ~ 80 degrees) with a radius of 220 AU and a sharp outer edge, potentially due to flyby truncation by a nearby candidate stellar companion. Fitting radiative transfer disk models simultaneously to the imaging and SED allows determination of key disk properties as well as constraints on the nature of the scattering dust grains.

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