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UID:69dde96ee94fc
DTSTAMP:20260414T031454
DTSTART:20151008T113000
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TRANSP:OPAQUE
DTEND:20151008T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/636377-the-radio-prop
 erties-of-brightest-cluster-galaxies-mike-hogan-u-of-waterloo
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:The Radio Properties of Brightest Cluster Galaxies - Mike Hogan (U 
 of Waterloo)
DESCRIPTION:Synopsis: AGN feedback from Brightest Cluster Galaxies (BCG)\, 
 is believed to counteract runaway cooling in galaxy clusters\, mainly via 
 the mechanical action of radio-emitting jets. Radio observations are there
 fore crucial for understanding the processes at play in cluster cores. Usi
 ng a large volume of radio data across a wide range of spectral\, spatial 
 and temporal frequencies\, we find striking environmental differences betw
 een BCGs hosted by settled “cool-core” clusters\, and those in more dy
 namically disturbed systems. Furthermore\, a significant subset of sources
  are found to exhibit very active radio cores that often only become appar
 ent at higher radio frequencies. Tracing HI in absorption against these br
 ight cores is a powerful technique to uncover the neutral gas content in t
 he vicinity of the central black hole\, and I will finish by discussing ou
 r successful search for such absorption\, and the gas properties deduced.
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