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Millimeter interferometric investigations of the energy sources of nearby ULIRGs Masa Imanishi ( NAO Japan )

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Presentation on theme: "Millimeter interferometric investigations of the energy sources of nearby ULIRGs Masa Imanishi ( NAO Japan )"— Presentation transcript:

1 Millimeter interferometric investigations of the energy sources of nearby ULIRGs Masa Imanishi ( NAO Japan )

2 NLR Buried AGNs ULIRGs: powerful energy sources hidden behind dust Obscured by torus-shaped dust

3 Buried AGNs (=X-ray source) produce XDRs HCN/HCO+ HCN/CO starburst pure AGN XDRs and PDRs(starbursts) are distinguishable from mm line ratios

4 ULIRGs with buried AGNs ULIRGs without buried AGNs Pure AGN Starburst

5 The AGN-nuclear starburst connections in Seyfert 1 and 2 galaxies Masa Imanishi ( NAO Japan )

6 Nuclear stabursts in a dusty torus Dust torus is rich in molecular gas Nuclear starbursts may occur Sy1 Sy2 PAH 3.3um PAH 3.3um PAH PAH = starburst tracer

7 L(3.3 PAH) = nuclear starburst Nuclear N-band, radio core = AGN power nuclear starburst luminosity : Sy1s = Sy2s L(nuclear starburst) and L(AGN): correlate Imanishi 2003 ApJ 599 918 Imanishi and Wada 2004 ApJ 617 214


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