Shocked molecular hydrogen in NGC 4038/4039, 'the antennae'

Details Shocked molecular hydrogen in NGC 4038/4039, 'the antennae' Shocked molecular hydrogen in NGC 4038/4039, 'the antennae'

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..995c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 97, April 1989, p. 995-999, 1253.

Astronomy and Astrophysics

Astronomy

7

Galactic Nuclei, Hydrogen Clouds, Infrared Sources (Astronomy), Interacting Galaxies, Molecular Gases, H Ii Regions, Luminosity, Molecular Clouds, Supernovae, Vibrational Spectra

Scientific paper

The nuclei of the interacting pair NGC 4038/4039 have been observed in the 2.123-micron v = 1 to 0 S(1) line of excited molecular hydrogen. The observed S(1)-line luminosity/FIR luminosity ratios for NGC 4038 and NGC 4039 are found to be too high to be compatible with a model in which the H2 is excited by radiatively driven gas motions in the star-forming regions. Alternative excitation mechanisms considered include supernova explosions and collisions between the molecular clouds of the two galaxies.

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