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SUMMARY:Comoving magnetohydrodynamic waves and a new suite of cosmological
  galaxy cluster simulations - Thomas Berlok (Niels Bohr Institute)
DTSTART:20240528T130000Z
DTEND:20240528T140000Z
UID:TALK212155@talks.cam.ac.uk
CONTACT:Loren E. Held
DESCRIPTION:Galaxy clusters form at the densest knots in the cosmic web an
 d can contain thousands of individual galaxies. The space between the gala
 xies contains a very hot and dilute plasma\, known as the intracluster med
 ium\, which can be observed with X-ray telescopes. Galaxy clusters continu
 ously grow via accretion and mergers\, which excite motions and turbulence
  in the intracluster medium. In this talk\, I will first describe how anal
 ytic solutions for linear hydromagnetic waves can be used for testing cosm
 ological magnetohydrodynamic (MHD) codes.  I will then present  PICO-Clust
 ers\, a new suite of cosmological zoom-in simulations of 25 massive (M_200
 \,c > 10^14.9 M_sun) galaxy clusters. These simulations use the moving mes
 h code Arepo\, the IllustrisTNG galaxy formation model and start with a we
 ak seed magnetic field initialised at z=127\, which is then evolved using 
 comoving ideal magnetohydrodynamics. I will discuss the driving of turbule
 nce and amplification of magnetic fields in the intracluster medium and th
 e cluster mass dependence of the resulting amplitudes. Finally\, I will pr
 esent the current status of performing cosmological cluster simulations us
 ing Braginskii viscosity to model a weakly collisional intracluster medium
 .
LOCATION:MR14 DAMTP and online
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