Millimeter interferometer observations of infrared luminous galaxies - NGC 828 and NGC 6240

Details Millimeter interferometer observations of infrared luminous galaxies - NGC 828 and NGC 6240 Millimeter interferometer observations of infrared luminous galaxies - NGC 828 and NGC 6240

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...368..112w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 368, Feb. 10, 1991, p. 112-118.

Astronomy and Astrophysics

Astronomy

33

Infrared Sources (Astronomy), Interacting Galaxies, Microwave Interferometers, Carbon Monoxide, Emission Spectra, Galactic Nuclei, Interstellar Gas, Luminosity, Millimeter Waves, Molecular Gases

Scientific paper

Millimeter interferometer observations of the infrared luminous galaxies NGC 828 and NGC 6240 at about 7 arcsec resolution are reported which reveal details of the spatial distribution and kinematics of molecular gas in these two high-luminosity IRAS galaxies. The centers of both galaxies have massive concentrations of molecular gas representing a large fraction of the total dynamical mass. These regions are likely to be extremely unstable to gravitational instability. The high infrared luminosity of these galaxies is probably triggered by the galactic interaction. However, the estimated available kinetic energy in the ISM indicates that the luminosity can be provided by the bulk kinetic energy release for no more than 10 to the 6th yr, far too short compared to the time scale for merging. In both galaxies, the CO data support the general picture that these are merger systems.

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