Luminous Buried AGNs in Ultraluminous Infrared Galaxies

Details Luminous Buried AGNs in Ultraluminous Infrared Galaxies Luminous Buried AGNs in Ultraluminous Infrared Galaxies

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1240...72i&link_type=abstract

HUNTING FOR THE DARK: THE HIDDEN SIDE OF GALAXY FORMATION. Edited by Victor P. Debattista and Cristina C. Popescu AIP Conferen

Physics

Galaxies, Spectroscopy, Infrared Sources, Stellar Mass, Origin, Formation, Evolution, Age, And Star Formation, Spectroscopy And Spectrophotometry, Infrared, Masses

Scientific paper

We present the results of our systematic infrared 2.5-35 μm low-resolution spectroscopy of nearby ultraluminous infrared galaxies (ULIRGs) at z<0.3, using Subaru, AKARI, and Spitzer. We detected the signatures of optically-elusive, but intrinsically luminous, buried AGNs in a significant fraction of ULIRGs classified optically as non-Seyferts. We found that the energetic importance of buried AGNs depends on galaxy infrared luminosity, suggesting that the AGN-starburst connections are luminosity dependent. It is suggested that buried AGNs are energetically more important in the progenitors of more massive galaxies, which might be related to the AGN feedback scenario for the galaxy downsizing phenomenon.

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