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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20080619T000000
DTEND;TZID=Atlantic/Canary:20080619T010000
UID:iactalks-51
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/51
CREATED:2008-06-19T00:00:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Quantification of bar strength and the structure of galaxies
DESCRIPTION:Quantification of bar strength and the structure of galaxies\nP
 rof. Ronald Buta\n\nBars are important engines for the evolution of struct
 ure in galaxies. Bars can cause secular evolution of both the gas and stel
 lar distributions in galaxies, and recently it has been suggested that bar
 s may be recurrent features, forming, dissolving, and reforming over a Hub
 ble time. Models also have suggested that the strength of bars depends on 
 how effectively the bar can transfer angular momentum to outer halo materi
 al. Evaluating current models requires an effective way of quantifying the
  strengths of bars. In my presentation, I will describe recent attempts to
  use gravitational torques implied by near-infrared images as a means of q
 uantifying both bars and spirals in disk galaxies. I will also describe so
 me of the recent findings based on Fourier analysis of early-type galaxy b
 ars.\n\n
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