H2 emission in galaxies - Observational constraints on ultraviolet excitation

Details H2 emission in galaxies - Observational constraints on ultraviolet excitation H2 emission in galaxies - Observational constraints on ultraviolet excitation

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...239...78m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 239, no. 1-2, Nov. 1990, p. 78-84.

Astronomy and Astrophysics

Astrophysics

57

Emission Spectra, Hydrogen, Seyfert Galaxies, Starburst Galaxies, Ultraviolet Spectra, Astronomical Spectroscopy, Galactic Nuclei, Interstellar Matter, Star Formation

Scientific paper

The possible importance of UV fluorescent excitation in observations of H2 lines in galactic nuclei was investigated. Spectra were obtained at R of about 1500 around 2 microns of the 1-0S(1), 2-1S(1), and 1-0S(0) lines of H2 plus the Br-gamma hydrogen recombinaton line of ten galaxies exhibiting Seyfert and/or starburst activity. It is shown that the observed H2 line ratios are consistent with thermal excitation of the H2 emission and rule out any significant pure radiative fluorescent contribution.

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