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SUMMARY:Brightest Cluster Galaxies - Ages and metallicities of stellar pop
 ulations
DTSTART;VALUE=DATE-TIME:20110714T103000Z
DTEND;VALUE=DATE-TIME:20110714T104500Z
DTSTAMP;VALUE=DATE-TIME:20260614T231852Z
UID:indico-contribution-5100@events.saip.org.za
DESCRIPTION:Speakers: Viljoen Danièl (North-West University)\nThe aim of 
 this project is to study the stellar populations\, and thereby evolution a
 nd star formation histories of brightest cluster galaxies (BCGs). In parti
 cular\, I will determine if a Single Stellar Populations (SSP) or Composit
 e Stellar Populations (CSP) provides the most significant fit for the BCGs
  using high signal-to-noise ratio (S/N)\, long-slit spectra\, obtained on 
 the Gemini and WHT telescopes. By using the ULySS software package\, the d
 ata will be fitted against the Pegase. HR and Vazdekis/Miles stellar popul
 ation models to simultaneously derive the SSP equivalent ages and metallic
 ities of the BCGs. Furthermore the stellar populations will be decomposed 
 into two or more components\, and the chi square (χ2) value for each comp
 onent is used to determine whether a SSP or CSP represents the BCGs most a
 ccurately. We find that both young and old stars are present in the stella
 r populations of these BCGs\, and those BCGs\, therefore show surprisingly
  diverse star formation histories.\n\nhttps://events.saip.org.za/event/7/c
 ontributions/5100/
LOCATION: Acro2
URL:https://events.saip.org.za/event/7/contributions/5100/
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