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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20221004T123000
DTEND;TZID=Atlantic/Canary:20221004T133000
UID:iactalks-1605
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/1605
CREATED:2022-10-04T12:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Hunting for VIPERS red nuggets - traces of the past
DESCRIPTION:Hunting for VIPERS red nuggets - traces of the past\nKrzysztof 
 Lisiecki\n\nVimos Public Extragalactic Redshift Survey (VIPERS) is a spect
 roscopic  survey designed to  investigate the spatial distribution of
  ~90k  galaxies on redshift 0.4<z<1.2. The catalogue of spectroscopi
 c  observations, combined with auxiliary photometric data, is perfect for 
  evolutionary studies of different types of galaxies. But also for  tracin
 g rare objects. One of them are the so-called “red nuggets”,  
 progenitors of the most massive galaxies in the local Universe.  The 
  discovery of red nuggets - highly massive, passive and extremely compact 
  galaxies  -  at high redshift challenged the leading cosmologic
 al  models, as they do not fit into the evolutionary paths of passive  gal
 axies. Taking into account  that  the galaxies' mergers are  sto
 chastic events, it is possible that some red nuggets  remain  relativ
 ely unaltered for billions of years. Those survivors constitute a  group o
 f unique galaxies in the local Universe,  commonly named  “reli
 cs”. Despite numerous studies dedicated to red nuggets and relics,  
 the link between the population of compact, massive, passive galaxies in  
 the early Universe and their remnants in the local Universe, is still  poo
 rly understood.  In my talk I  will present the first spectroscopical
 ly selected  catalogue of red nuggets at the intermediate redshift.  
 It is the most  extensive catalogue of this kind of galaxies above redshif
 t z > 0.5.   Selected under the most strict criteria, the group of
  77 objects  consists of a statistically important sample, which allows fo
 r analysis  of physical properties of those rare passive giants. I will di
 scuss the  influence of compactness criteria on the sample size. Moreover 
 I will  present  VIPERS red nuggets number densities and discuss the 
  environmental preferences of those exceptional galaxies.
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