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SUMMARY:Stimulated Feedback In Galaxies and Clusters - Brian McNamara (Uni
 versity of Waterloo\, Canada)
DTSTART:20160421T150000Z
DTEND:20160421T160000Z
UID:TALK65680@talks.cam.ac.uk
CONTACT:Simon Hodgkin
DESCRIPTION:Galaxy clusters are immersed in hot atmospheres shining X-rays
 .  At their centres reside the largest galaxies in the universe.  A signif
 icant fraction of central galaxies harbour molecular gas reservoirs exceed
 ing 10^9 solar masses that are fuelling star formation at rates of tens of
  solar masses per year.  \nNew observations obtained with the Atacama Larg
 e Millimeter Array have revealed a diversity of molecular gas dynamics and
  morphologies including\, inflow and outflow\, and star formation occurrin
 g in filaments rather than in molecular disks. Molecular cloud ensemble ve
 locities often lie far below the stellar velocity dispersions\, approachin
 g terminal\nrather than free-fall speeds.  Observation indicates that mole
 cular clouds are lifted by\, and/or form\, quickly in the wakes of buoyant
 ly-rising radio bubbles.  This mechanism may lead to circulating flows of 
 hot and cold gas that sustains feedback in massive galaxies.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 3:30 pm)
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