Computer Science
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9124029e&link_type=abstract
Unknown
Computer Science
Barred Galaxies, Emission Spectra, Infrared Radiation, Interstellar Matter, Line Spectra, Solar Spectra, Comparison, Elliptical Galaxies, Molecular Gases, Quasars, Seyfert Galaxies, Starburst Galaxies
Scientific paper
Measurements of isotopic CO line emission and J, H, K near infrared continuum emission of the barred spiral 6764 are reported. The optical, near infrared, and millimeter data are in excellent agreement with a brief and intense starburst at the nucleus. This finding is supported by the Wolf-Rayet emission line features seen in the nucleus of the galaxy which is direct evidence for recent massive star formation. By comparing NGC 6764 to a starburst galaxy, elliptical radio galaxy, Seyfert galaxy, and a quasar it is concluded that, judged from the two lowest rotational levels of CO, these sources show common beam averaged properties of the molecular gas. The bulk of the nuclear molecular line emission arises in warm, dense, optically thick gas. The CO line emission in the disks and arms of the galaxies arises from cold and probably subthermally excited gas.
Cameron Maryellen
Eckart Andreas
Genzel Reinhard
Harris Andrew I.
Jackson James M.
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