12 and 18 micron images of dust surrounding HD 32297

Details 12 and 18 micron images of dust surrounding HD 32297 12 and 18 micron images of dust surrounding HD 32297

2007-07-23

arxiv.org/abs/0707.3294v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures; accepted for publication in ApJL

Scientific paper

10.1086/521722

We present the first subarcsecond-resolution images at multiple mid-IR wavelengths of the thermally-emitting dust around the A0 star HD 32297. Our observations with T-ReCS at Gemini South reveal a nearly edge-on resolved disk at both 11.7 microns and 18.3 microns that extends ~150 AU in radius. The mid-IR is the third wavelength region in which this disk has been resolved, following coronagraphic observations by others of the source at optical and near-IR wavelengths. The global mid-IR colors and detailed consideration of the radial color-temperature distribution imply that the central part of the disk out to ~80 AU is relatively deficient in dust.

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