H2 2.122 micron emission in NGC 3783 with a bare type 1 Seyfert nucleus

Details H2 2.122 micron emission in NGC 3783 with a bare type 1 Seyfert nucleus H2 2.122 micron emission in NGC 3783 with a bare type 1 Seyfert nucleus

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...342l..55k&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 342, July 15, 1989, p. L55-L58. Research supported by the Monbush

Astronomy and Astrophysics

Astronomy

17

Active Galactic Nuclei, Emission Spectra, Hydrogen, Infrared Astronomy, Seyfert Galaxies, Infrared Astronomy Satellite, Luminosity, Molecular Clouds, Ultraviolet Radiation, X Rays

Scientific paper

The molecular hydrogen line, v = 1-0 S(1), has been detected in NGC 3783, which has a bare type-1 Seyfert nucleus free of extinction and contamination from the host galaxy. The luminosity of the line is 10-50 times smaller than that of NGC 7469, a dusty type 1 Seyfert. The possible connection between the presence of molecular clouds in and/or around the nucleus and the heavy absorbing column density derived from the X-ray cutoff are discussed, along with possible sources for the excitation of H2 molecules; namely, shock excitation by a wind from the nucleus, UV pumping by the nonthermal source, and X-ray heating of molecules by the strong X-ray source.

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