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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20120228T000000
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UID:iactalks-371
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/371
CREATED:2012-02-28T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:AGN activity in Local Luminous Infrared Galaxies
DESCRIPTION:AGN activity in Local Luminous Infrared Galaxies\nDr. Almudena 
 Alonso Herrero\n\nLuminous Infrared Galaxies (LIR=10^11-10^12Lsun) have st
 ar formation rates in the range of ~20-200Msun/yr. In the local Universe ~
 50% LIRGs show AGN or AGN/SB composite nuclear activity from optical spect
 roscopy. We decompose Spitzer/IRS 5-35micron spectra of a complete sample 
 of 50 local (d<75Mpc) LIRGs using SB and AGN clumpy torus model templat
 es. We derive a mid-IR AGN detection rate in our sample of local LIRGs of 
 50%. We also compare the continuum mid-IR AGN detection with other indicat
 ors in the mid-IR, optical and X-rays. We estimate for the first time the 
 AGN bolometric contribution to the IR luminosity of the galaxies in local 
 LIRGs. We find that one-third of local LIRGs have LAGN(bol)/LIR>0.05, w
 ith only ~10% having a significant contribution LAGN(bol)/LIR>0.25. Thi
 s is in line with results of Nardini et al. (2010) that only at LIR>3x1
 0^12Lsun the AGN starts dominating bolometrically the IR luminosity in the
  majority of the systems.
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