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| Paper: |
High-Resolution Mid-Infrared Morphology of Cygnus A |
| Volume: |
249, The Central Kiloparsec of Starbursts and AGN: the La Palma Connection |
| Page: |
325 |
| Authors: |
Radomski, James T.; Piña, Robert K.; Packham, Christopher; Telesco, Charles M.; Tadhunter, Clive N. |
| Abstract: |
We present sub-arcsecond resolution mid-infrared images at 10.8 and 18.2 microns of Cygnus A. These images were obtained with the University of Florida mid-IR camera/spectrometer, OSCIR, at the Keck II 10 m telecope. Our data show extended mid-IR emission primarily to the east of the nucleus with a possible western extension detected after image deconvolution. This extended emission is closely aligned with the bi-cone observed at optical and near-IR wavelengths by HST. This morphology is consistent with warm dust destruction within the bi-cone, possibly due to outflows from the central quasar which also may cause a density enhancement along the walls of the ionization cone. Additionally, we also marginally detect large-scale low-level emission extending > 1.5 kpc from the nucleus. |
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