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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20131203T123000
DTEND;TZID=Atlantic/Canary:20131203T133000
UID:iactalks-569
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/569
CREATED:2013-12-03T12:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:The Hunting of relic galaxies in the Nearby Universe 
DESCRIPTION:The Hunting of relic galaxies in the Nearby Universe \nDr. Igna
 cio Trujillo\n\nAs early as 10 Gyr ago, galaxies with more than 10^11 M* i
 n stars already existed. While most of these massive galaxies must have su
 bsequently transformed through on-going star formation and mergers with ot
 her galaxies, a small fraction (<0.1%) may have survived untouched till
  today. Searches for such relic galaxies, useful windows to explore the ea
 rly Universe, have been inconclusive to date. In this talk, we will presen
 t the first case of a nearby galaxy, NGC1277 (at a distance of 73 Mpc in t
 he Perseus galaxy cluster), which fulfils many criteria to be considered a
  relic galaxy. Using deep optical spectroscopy, we derive the star formati
 on history along the structure of the galaxy: the stellar populations are 
 uniformly old (>10 Gyr) with no evidence for more recent star formation
  episodes. The metallicity of their stars is super-solar ([Fe/H]=0.20+-0.0
 4 with a smooth decline towards the outer regions) and alpha enriched ([al
 pha/Fe]=0.4+-0.1). This suggests a very short formation time scale for the
  bulk of stars of this galaxy. This object also rotates very fast (V_{rot}
 ~300 km/s) and has a large central velocity dispersion (sigma>300 km/s)
 . NGC1277 allows the explorations in full detail of properties such as the
  structure, internal dynamics, metallicity and initial mass function at ~1
 0-12 Gyr back in time when the first massive galaxies were built.
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