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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20161004T123000
DTEND;TZID=Atlantic/Canary:20161004T133000
UID:iactalks-949
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/949
CREATED:2016-10-04T12:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:The distribution of stellar mass in galaxy clusters over cosmic tim
 e
DESCRIPTION:The distribution of stellar mass in galaxy clusters over cosmic
  time\nDr. Remco Van-Der-Burg\n\nGalaxy clusters are the most massive grav
 itationally collapsed  structures in the universe, and they have important
  cosmological and  astrophysical applications. Measurements of the radial 
 distribution of  galaxies in clusters show how galaxies trace the underlyi
 ng dark matter  distribution, and provide constraints on the physics relat
 ed to their  evolution in these environments. I will present measurements 
 on the  radial distribution of galaxies in two cluster samples, which span
  about  8 Gyrs of lookback time. By matching local galaxy clusters to thei
 r  progenitors at high redshift, we study how clusters assemble their  ste
 llar mass content. Interestingly, this suggests that the central part  of 
 the stellar mass distribution of local galaxy clusters is already in  plac
 e at redshift, and any further growth seems to happen in an  inside-out fa
 shion. I will put these findings into context by comparing  them to the re
 sults from dark matter simulations. I will also focus on  the abundance an
 d spatial distribution of ultra-diffuse galaxies (UDGs,  which have the lu
 minosities of dwarfs but sizes of giant galaxies) in  clusters. These myst
 erious galaxies have been found to be surprisingly  abundant in local clus
 ters, but their origin remains puzzling. I will  discuss what we can learn
  about the properties of UDGs by studying their  abundance as a function o
 f halo mass, and their radial distribution in  these haloes.
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