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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20181128T103000
DTEND;TZID=Atlantic/Canary:20181128T113000
UID:iactalks-1224
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/1224
CREATED:2018-11-28T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Indiana Jones and where to find relic galaxies   
DESCRIPTION:Indiana Jones and where to find relic galaxies   \nFernando Bui
 trago\n\nThere are galaxies that remain untouched since the ancient Univer
 se. These unique objects, the so-called relic galaxies, are several times 
 more massive than our Milky Way but with much smaller sizes, and containin
 g very old (>10 Gyr) stellar populations. For the very few of them alre
 ady found and analysed (most of them by our IAC colleagues), they seem to 
 host "too heavy" central super massive black holes, also displaying an ove
 rabundance of low mass versus high mass stars and retaining their primeval
  morphologies and kinematics. How did they survive until the present day? 
 Simulations predict that they reside in galaxy overdensities whose large i
 nternal random motions prevent galaxies from merging. However, we have not
  yet determined observationally neither the environments these galaxies in
 habit nor how many there are (their number densities). We make use of the 
 GAMA survey, that allows us to conduct a complete census of this elusive g
 alaxy population, because of its large area and spectroscopic completeness
 . After inspecting 180 square degrees of the sky using the deepest photome
 tric images available, we identified 29 massive ultracompact galaxies in t
 he nearby Universe (0.02 < z < 0.3), that are true windows to the an
 cient Universe. I will present the first paper about this exceptional samp
 le, describing their properties andhighlighting the fact that while some g
 alaxies seem to be satellitesof bigger objects, others are not located in 
 clusters, at odds with the theoretical expectations. 
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