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High-resolution mid-infrared imaging and astrometry of the nucleus of the Seyfert galaxy NGC 1068The Goddard Infrared Array Camera was used to obtain a high resolution image of the nucleus of NGC 1068 at 12.4 microns. In addition, the peak emission at 12.4 microns relative to the peak of the optical continuum was determined. The distribution of the 12.4 micron emission relates to both the forbidden O III 5007A 'ionization cone' and the optical continuum emission imaged by HST. This distribution is also found to have an alignment perpendicular to the plane of a putative molecular torus. It is suggested that the extended mid-infrared emission is thermal radiation from dust in circumnuclear clouds heated by the collimated optical/UV AGN source. A portion of the unresolved 12.4 micron emission possibly originates from the torus. The infrared emission peak is found to coincide with the apex of the ionization cone, which is presumed to be the location of the torus.
Document ID
19930053816
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Braatz, J. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wilson, A. S.
(Maryland Univ. College Park, United States)
Gezari, D. Y.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Varosi, F.
(Maryland Univ. College Park; Hughes/STX Corp., Lanham, United States)
Beichman, C. A.
(California Inst. of Technology Pasadena, United States)
Date Acquired
August 16, 2013
Publication Date
May 20, 1993
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 409
Issue: 1
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
93A37813
Funding Number(s)
CONTRACT_GRANT: NAGW-2689
CONTRACT_GRANT: NAG8-793
CONTRACT_GRANT: NAG5-1532
Distribution Limits
Public
Copyright
Other

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