Resolved mid-IR emission in the Narrow Line Region of NGC 4151

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Title: Resolved mid-IR emission in the Narrow Line Region of NGC 4151
Author: Radomski, James; Pina, Robert; Packham, Christopher; Telesco, Charles; De Buizer, James; Fisher, Scott; Robinson, Andrew
Abstract: We present subarcsecond resolution mid infrared images of NGC 4151 at 10.8µm and 18.2µm. These images were taken with the University of Florida mid-IR camera/spectrometer OSCIR at the Gemini North 8 m telescope. We resolve emission at both 10.8µm and 18.2µm extending s 3.5′′ across at a P.A. of s 60◦. This coincides with the the narrow line region of NGC 4151 as observed in [OIII] by the Hubble Space Telescope. The most likely explanation for this extended mid-IR emission is dust in the narrow line region heated by a central engine. We find no extended emission associated with the proposed torus and place an upper limit on its mid-IR size of . 35 pc. (Refer to PDF file for exact formulas).
Description: Also archived in: arXiv:astro-ph/0212307 v1 12 Dec 2002
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Date: 2003-04-10

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