Spatially Resolved Circumnuclear Dust in Centaurus A

Details Spatially Resolved Circumnuclear Dust in Centaurus A Spatially Resolved Circumnuclear Dust in Centaurus A

2003-11-05

arxiv.org/abs/astro-ph/0311139v1

Astrophys.J. 598 (2003) L91-L94

Astronomy and Astrophysics

Astrophysics

14 pages 3 figures, to appear in The Astrophysical Journal Letters

Scientific paper

10.1086/380816

In this paper we present results from our exploratory mid-IR study of Centaurus A circumnuclear environment using high-angular resolution imaging at the Magellan 6.5m telescope with the MIRAC/BLINC camera. We detected emission from a compact region surrounding the nuclear source, and obtained photometry at 8.8 microns and in the N band. Our analysis suggests that the nuclear region is resolved with a size of approximately 3 pc. The mid-IR emission from this region is likely associated with cool dust with an estimated temperature of \~160 K, surrounding the central ``hidden'' AGN. We discuss the characteristics of this emission in relation to other mid-IR observations and the implications on models of dust formation in AGNs.

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