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DTSTART;TZID=Atlantic/Canary:20120320T000000
DTEND;TZID=Atlantic/Canary:20120320T010000
UID:iactalks-374
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/374
CREATED:2012-03-20T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Are luminous quasars triggered in galaxy mergers?
DESCRIPTION:Are luminous quasars triggered in galaxy mergers?\nPatricia S. 
 Bessiere\n\nThe mechanism by which AGN activity is triggered has long been
  debated. One, often suggested, method of doing so is major, gas-rich merg
 ers and galaxy interactions. I will present deep Gemini GMOS-S images of a
  sample of type II quasar host galaxies, demonstrating that 75% show clear
  signs that they are undergoing some kind of interaction. We compare these
  results with a control sample of quiescent early-type galaxies and find a
  similar rate of interaction (68%). However, we also find that the surface
  brightness of the features of the type II quasars are up to 2 mags bright
 er than those for the control sample, suggesting a difference in the types
  of mergers that the two groups are undergoing. We also compare our result
 s with those for a sample of powerful radio galaxies and find very similar
  values for the surface brightness of the detected features.
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