Millimeter Interferometric Observations of Nearby Luminous Infrared Galaxies

Details Millimeter Interferometric Observations of Nearby Luminous Infrared Galaxies Millimeter Interferometric Observations of Nearby Luminous Infrared Galaxies

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..373..614i&link_type=abstract

The Central Engine of Active Galactic Nuclei, ASP Conference Series, Vol. 373, proceedings of the conference held 16-21 October,

Computer Science

Scientific paper

We present interferometric observations at 3 mm, using the Nobeyama Millimeter Array, of luminous infrared galaxies (LIRGs) with and without luminous buried AGN signatures in infrared spectra. Both HCN (J=1-0) and HCO+ (J=1-0) molecular lines are observed simultaneously. The HCN to HCO+ brightness temperature ratios toward the nuclei of these LIRGs are derived and are compared with those of galaxies known to be dominated by active galactic nuclei (AGNs) or starbursts. LIRGs with (without) luminous buried AGN signatures tend to distribute in the range occupied by AGN-dominated (starburst-dominated) galaxies, suggesting that this millimeter interferometric method is potentially an effective tool to find elusive buried AGNs, because dust extinction is negligible in this wavelength range.

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