VLA imaging of extragalactic ammonia - Hot gas in the nucleus of IC 342

Journal Article · Tue May 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185728· OSTI ID:6696496

Ho, P T.P.; Martin, R N; Turner, J L; Jackson, J M ^[1]

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1. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA) Steward Observatory, Tucson, AZ (USA) California Univ., Los Angeles (USA) Max-Planck-Institut fuer Extraterrestrische Physik, Garching (Germany, F.R.)

Extragalactic NH{sub 3} is successfully imaged with 5-arcsec resolution using the VLA. Essentially all the single-dish flux is recovered in the interferometer maps. The hot gas (above 70 K), inferred from single-dish NH{sub 3} line-intensity ratios, appears to be closely associated with the innermost portions of the nuclear bar seen in CO. Small-scale anticorrelation of the NH{sub 3} emission with the central thermal radio continuum emission is likely to be due to heating and photoionization effects. 22 refs.

• OSTI ID: 6696496
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 355; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMMONIA
COSMIC GASES
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
FLUIDS
GALAXIES
GALAXY NUCLEI
GASES
HEATING
HYDRIDES
HYDROGEN COMPOUNDS
INTERGALACTIC SPACE
IONIZATION
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
PHOTOIONIZATION
RADIATIONS
RADIO GALAXIES
RADIOWAVE RADIATION
RESOLUTION
SPACE