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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20100301T000000
DTEND;TZID=Atlantic/Canary:20100301T010000
UID:iactalks-81
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/81
CREATED:2010-03-01T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Luminous buried AGNs and the AGN-starburst connections in the local
  Universe
DESCRIPTION:Luminous buried AGNs and the AGN-starburst connections in the l
 ocal Universe\nDr. Masa Imanishi\n\nWe present the results of our systemat
 ic search for optically elusive, but intrinsically luminous buried AGNs in
  >100 nearby (z < 0.3) luminous infrared galaxies with L(IR) > 1011 L&#885
 7;, classified optically as non-Seyferts. To disentangle AGNs and stars, w
 e have performed (1) infrared 2.5-35 &mu; low-resolution (R ~ 100) spectro
 scopy using Subaru, AKARI, and Spitzer, to estimate the strengths of PAH (
 polycyclic aromatic hydrocarbon) emission and dust absorption features, (2
 ) high-spatial-resolution infrared 20 micron imaging observations using Su
 baru and Gemini, to constrain the emission surface brightnesses of energy 
 sources, and (3) millimeter interferometric measurements of molecular gas 
 flux ratios, which reflect the physical and chemical effects from AGNs and
  stars. Overall, all methods provided consistent pictures. We found that t
 he energetic importance of buried AGNs is relatively higher in galaxies wi
 th higher infrared luminosities (where more stars will be formed), suggest
 ing that AGN-starburst connections are luminosity dependent. Our results m
 ight be related to the AGN feedback scenario as the possible origin of the
  galaxy down-sizing phenomenon.\n
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