Thermal Emission from a Newly Resolved Debris Disk

Details Thermal Emission from a Newly Resolved Debris Disk Thermal Emission from a Newly Resolved Debris Disk

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21340917f&link_type=abstract

American Astronomical Society, AAS Meeting #213, #409.17; Bulletin of the American Astronomical Society, Vol. 41, p.210

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the detection of an extended disk surrounding the A2IV star HD 131835, a young ( 10-20 Myr) star at 110 parsec and a likely member of the Upper Centaurus Lupus moving group. We have spatially resolved the disk in thermal emission at 11.7 and 18.3 µm with the T-ReCS instrument on Gemini South. The images show extensions indicating the disk is seen at an inclination near edge-on, with a PA of 55°. In both bands, the disk ansae are detected out to sensitivity limits at 100-150 AU. The morphology of the 18.3 µm image reveals a warp in the outermost regions, deviating 30° from the inner disk. Spatially unresolved excess above the stellar photosphere is also detected in both bands, which can be explained by a source of parent bodies interior to 35 AU. Subtraction of this unresolved component suggests differing color temperature between the resolved ansae. In turn, this indicates the presence of dynamical processes that affect the azimuthal dependence of the grain size distribution.

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