Hot gas in the nucleus of IC 342

Details Hot gas in the nucleus of IC 342 Hot gas in the nucleus of IC 342

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308l...7m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 308, Sept. 1, 1986, p. L7-L10.

Astronomy and Astrophysics

Astrophysics

47

Galactic Nuclei, High Temperature Gases, Interstellar Gas, Spiral Galaxies, Star Formation, Ammonia, Line Spectra, Molecular Rotation

Scientific paper

The detection of the (J, K) = (3, 3) and (4, 4) rotation-inversion lines of NH3 in the central 1 kpc of the nearby spiral galaxy IC 342 and the remeasurement of the (J, K) = (1, 1) and (2, 2) lines are reported. The intensity ratios of these lines confirm that the population among the rotational states can be characterized by a temperature of about 50 K. The gas kinetic temperature can therefore be estimated to be about 70 K. The presence of hot gas in the nucleus of IC 342 is most likely related to the formation of many young OB stars in the nucleus, as indicated by infrared and radio continuum measurements.

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