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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20130129T123000
DTEND;TZID=Atlantic/Canary:20130129T133000
UID:iactalks-467
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/467
CREATED:2013-01-29T12:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:The Nature and Nurture of Bars and Disks 
DESCRIPTION:The Nature and Nurture of Bars and Disks \nDr. Jairo Méndez Ab
 reu\n\nThe effects that environment produce on galaxy disks and how they m
 odify  the subsequent formation of bars need to be distinguished to fully 
  understand the relationship between bars and environment. To shed light  
 on this issue, we derive the bar fraction in three different  environments
  ranging from the field to Virgo and Coma Clusters, covering  an unprecede
 ntedly large range of galaxy luminosities (or,  equivalently, stellar mass
 es). We confirm that the fraction of barred  galaxies strongly depends on 
 galaxy luminosity. We also show that the  difference between the bar fract
 ion distributions as a function of  galaxy luminosity (and mass) in the fi
 eld and Coma Cluster is  statistically significant, with Virgo being an in
 termediate case. We  interpret this result as a variation of the effect of
  environment on bar  formation depending on galaxy luminosity. We speculat
 e that brighter  disk galaxies are stable enough against interactions to k
 eep their cold  structure, thus, the interactions are able to trigger bar 
 formation. For  fainter galaxies, the interactions become strong enough to
  heat up the  disks inhibiting bar formation and even destroying the disks
 . Finally,  we point out that the controversy regarding whether the bar fr
 action  depends on environment could be resolved by taking into account th
 e  different luminosity ranges probed by the galaxy samples studied so far
 .
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