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SUMMARY:Intracluster light in distant proto-clusters - Nina Hatch\, Univer
 sity of Nottingham
DTSTART:20230427T150000Z
DTEND:20230427T160000Z
UID:TALK198379@talks.cam.ac.uk
CONTACT:Dr. David Murphy
DESCRIPTION:Intracluster light is thought to originate from stars that wer
 e ripped away from their parent galaxies by gravitational tides and galaxy
  interactions during the build up of the cluster. The stars from such inte
 ractions will accumulate over time\, so semi-analytic models suggest that 
 the abundance of intracluster stars is negligible in young proto-clusters 
 at z~2 and grows to around a quarter of the stellar mass in the oldest\, m
 ost mature clusters. In contrast to these theoretical expectations\, I wil
 l show you detections of intracluster light within two proto-clusters usin
 g deep HST images\, with >50% of the stellar mass located more than 10 kpc
  away from the brightest cluster galaxies (BCGs). I will compare these qua
 ntitative observations to theoretical predictions from the latest semi-ana
 lytic models and the Hydrangea hydrodynamical galaxy cluster simulations t
 o show you that we still do not have a galaxy formation theory that can ad
 equately describe the growth of BCGs and intracluster light.
LOCATION:Hoyle Lecture Theatre - Details will be sent by email
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