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SUMMARY:Powerful Sound Waves from AGN Jets - Christopher Bambic
DTSTART:20190605T121500Z
DTEND:20190605T124500Z
UID:TALK122119@talks.cam.ac.uk
CONTACT:Catrina Diener
DESCRIPTION:Feedback from jetted active galactic nuclei (AGN) provides the
  energy injection necessary to prevent a ``cooling catastrophe'' in cluste
 rs of galaxies\, suppressing star formation and truncating the galaxy mass
  function consistent with observations. The details of how AGN jets transp
 ort and thermalise their energy throughout the intracluster medium (ICM) r
 emains an open question. We study how AGN jets produce sound waves which c
 an propagate energy to large distances\, uniformly dissipating and heating
  clusters. Using hydrodynamic simulations of supersonic jets in a model IC
 M\, we find that AGN jets can convert greater than 25% of their energy int
 o powerful long-wavelength sound waves. Our work argues that sound waves m
 ay comprise a significant fraction of the energy budget in cluster AGN fee
 dback and underscores the importance of properly treating compressive wave
  dissipation in the ICM.
LOCATION:Sackler Lecture Theatre\, IoA
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