BEGIN:VCALENDAR
VERSION:2.0
PRODID:https://murmitoyen.com/events/vanille/udem/
X-WR-TIMEZONE:America/Montreal
BEGIN:VEVENT
UID:69dbd97232fa9
DTSTAMP:20260412T134210
DTSTART:20170323T113000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20170323T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/758749-the-growth-of-
 the-most-massive-galaxies-in-the-highest-density-regions-evidence-for-in-s
 itu-star-formation-in-sparcs-brightest-cluster-galaxies
LOCATION:Pavillon Roger-Gaudry \, 2900\, boul. Édouard-Montpetit\, Local M
 -415\, Montréal\, QC\, Canada
SUMMARY:The Growth of the Most Massive Galaxies in the Highest Density Regi
 ons: Evidence for In-Situ Star Formation in SpARCS Brightest Cluster Galax
 ies
DESCRIPTION:Tracy Webb (McGill University)
\n 
\nRésumé:
\n 
\nThe most
  massive galaxies in the local universe reside at the centres of galaxy cl
 usters. Often called Brightest Cluster Galaxies (BCGs)\, they exhibit\, as
  a class\, highly uniform properties and are distinct from the general gal
 axy population. This suggests formation processes which are themselves dis
 tinct from those which dominate in massive galaxies outside of cluster cor
 es. The mass growth of BCGs is likely linked to the overall physics of hie
 rarchical structure formation on galaxy cluster scales\, including the fun
 damental processes of gas cooling\, star formation\, energy feedback and g
 alaxy mergers\, at the centers of giant dark matter halos. In this talk I 
 will present new results from the largest study of high-redshift BCGs cond
 ucted to date\, drawn from the SpARCS optical/NIR cluster survey. Using ar
 chival infrared data we show the star formation rate within BCGs increases
  to z~2\, and can add as much mass to the BCG population as the previous s
 tandard model of growth by dry mergers. At low redshifts\, and in X-ray/SZ
  selected clusters\, the rare examples of star forming BCGs appear to be f
 ed by large-scale cooling flows. However\, the first of the SpARCS systems
  we have studied in detail\, SpARCS1049\, has revealed a very different ph
 enomenon - a train-wreck of a galaxy merger at the center of the cluster. 
 This is the first example of such a process in high-redshift cluster cores
  and may represent a new phase of BCG evolution\, previously unaccounted f
 or.
END:VEVENT
BEGIN:VTIMEZONE
TZID:America/Montreal
X-LIC-LOCATION:America/Montreal
END:VTIMEZONE
END:VCALENDAR