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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20140114T123000
DTEND;TZID=Atlantic/Canary:20140114T133000
UID:iactalks-578
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/578
CREATED:2014-01-14T12:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:A tale of a galaxy cluster: unraveling the formation of RX J0152.7-
 1357
DESCRIPTION:A tale of a galaxy cluster: unraveling the formation of RX J015
 2.7-1357\nDr. Anna Ferré-Mateu\n\nGalaxy clusters are the perfect places 
  to study both the always controversial nature vs nurture problem and the 
  still not well understood evolution that galaxies follow. By studying  th
 e properties of the galaxies at different locations of the cluster we  can
  assess the first problem, while studying the same properties over  cosmic
  time, helps constraining the different proposed evolutionary  theories. I
 n this work we have focused in an intermediately-redshift  rich cluster, R
 X J0152.7-1357 (z=0.83), by fully characterizing its  stellar population p
 roperties with new state-of-the-art tools . By  this means, we have derive
 d for the first time in such a high-z cluster   the ages, metallicities, a
 bundance patterns and Star Formation  Histories of the cluster ETGs on an 
 individual galaxy-basis . The  relations that these properties follow with
  galaxy velocity dispersion  allow us to discuss a passive evolution scena
 rio with respect to a  cluster at z~0. Our results favor a downsizing pict
 ure where the  relation between the position within the cluster, the veloc
 ity  dispersion and the type of star formation history of the galaxies all
 ow  us to better understand the cluster evolution. We find that the most  
 massive galaxies evolve passively while the lower-mass ones, generally  lo
 cated at the outskirts of the cluster, experience a more extended star  fo
 rmation history related to their later incorporation in the cluster. 
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