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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20141120T103000
DTEND;TZID=Atlantic/Canary:20141120T113000
UID:iactalks-692
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/692
CREATED:2014-11-20T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Multiple Stellar Populations & Horizontal Branch Stars in Galactic 
 Globular Clusters: firm evidence, (apparent) anomalies and current shortco
 mings
DESCRIPTION:Multiple Stellar Populations & Horizontal Branch Stars in Galac
 tic Globular Clusters: firm evidence, (apparent) anomalies and current sho
 rtcomings\nDr. Santi Cassisi\n\nSince the early 50' of last century the st
 udy of Horizontal Branch stars  in Galactic GCs has been of pivotal releva
 nce since the core He-burning  stage is an 'amplifier' of any evolutionary
 /physical process occurring  during the early evolutionary stages. Thanks 
 to the huge observational  effort devoted to this issue many outstanding '
 anomalies' have been  discovered concerning the physical properties of GC 
 HB stars. The  situation is becoming more complex when accounting for the 
 discovery of  the Multiple Population phenomenon in Galactic GCs.  We will
  review the main anomalies related to the HB evolutionary stage,  their (w
 hen available) theoretical interpretations, and current  shortcomings. We 
 will also discuss how the discovery of the Multiple  Population Phenomenon
  offers a new approach for interpreting many  observational evidence.
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