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158 micron forbidden C II mapping of NGC 6946 - Probing the atomic mediumA well-sampled map (23 x 17 kpc) of the strong 158 micron forbidden C II cooling line in the Scd galaxy NGC 6946 at 55 arcsec resolution is presented which was taken with the MPE/UCB Far-infrared Imaging Fabry-Perot Interferometer (FIFI) in the Kuiper Airborne Observatory. It is concluded that the line emission in NGC 6946 is present in three spatially distinct components including nucleus, spiral arms, and extended region. An extended emission region is a source of most of the forbidden C II luminosity in NGC 6946. The 1 arcmin nuclear component has a line luminosity of 1.5 x 10 exp 7 solar luminosity and contributes 0.15 percent of the galaxy's total FIR luminosity. An extended component of forbidden C II emission is found to exist past the molecular extent of the galaxy and to be present to at least the full dimensions of the map. This component is attributed to a mixture of neutral and atomic clouds.
Document ID
19930050786
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Madden, S. C.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Geis, N.
(California Univ. Berkeley, United States)
Genzel, R.
(NASA Ames Research Center Moffett Field, CA, United States)
Herrmann, F.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Jackson, J.
(Boston Univ. MA, United States)
Poglitsch, A.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Stacey, G. J.
(Cornell Univ. Ithaca, NY, United States)
Townes, C. H.
(California Univ. Berkeley, United States)
Date Acquired
August 16, 2013
Publication Date
April 20, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 407
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A34783
Funding Number(s)
CONTRACT_GRANT: NAG2-208
Distribution Limits
Public
Copyright
Other

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