Spatially Resolved Circumnuclear Dust in Centaurus A | Zendy

Margarita Karovska | Zendy; M. Marengo | Zendy; M. Elvis | Zendy; G. G. Fazio | Zendy; Joseph L. Hora | Zendy; Philip M. Hinz | Zendy; W. F. Hoffmann | Zendy; Michael R. Meyer | Zendy; Eric E. Mamajek | Zendy

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Spatially Resolved Circumnuclear Dust in Centaurus A

Author(s) -

Margarita Karovska,

M. Marengo,

M. Elvis,

G. G. Fazio,

Joseph L. Hora,

Philip M. Hinz,

W. F. Hoffmann,

Michael R. Meyer,

Eric E. Mamajek

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/380816

Subject(s) - centaurus a , physics , astrophysics , photometry (optics) , astronomy , angular resolution (graph drawing) , active galactic nucleus , telescope , galaxy , stars , mathematics , combinatorics

In this paper we present results from our exploratory mid-IR study ofCentaurus A circumnuclear environment using high-angular resolution imaging atthe Magellan 6.5m telescope with the MIRAC/BLINC camera. We detected emissionfrom a compact region surrounding the nuclear source, and obtained photometryat 8.8 microns and in the N band. Our analysis suggests that the nuclear regionis resolved with a size of approximately 3 pc. The mid-IR emission from thisregion is likely associated with cool dust with an estimated temperature of\~160 K, surrounding the central ``hidden'' AGN. We discuss the characteristicsof this emission in relation to other mid-IR observations and the implicationson models of dust formation in AGNs.Comment: 14 pages 3 figures, to appear in The Astrophysical Journal Letter

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