Conveners
Thursday morning
- Mark Voit (Michigan State University)
Prof.
Daisuke Nagai
(Yale University)
14/08/2014, 09:00
Program
In recent years, the outskirts of galaxy clusters have emerged as one of the new frontiers for studying the physics of clusters and intergalactic medium. In this talk, I will discuss the physics of galaxy clusters outskirts, focusing on roles of cosmic gas accretion and non-equilibrium phenoma (such as gas inhomogeneities, turbulence, and electron-proton equilibration process operating in the...
Prof.
Brian O'Shea
(Michigan State University)
14/08/2014, 09:25
Program
Simulations of galaxy clusters have become significantly more realistic over time, and can now reliably reproduce many observable quantities outside of the cluster core. Unfortunately, however, many observables cannot be reproduced by the current generation due to challenges relating to numerical resolution or lack of physics. One set of such observables pertains around cluster galaxies -...
Dr
XUN SHI
(Max Planck Institute for Astrophysics)
14/08/2014, 09:50
Program
I will present an analytical model we recently developed for intracluster non-thermal pressure in the virial region of relaxed clusters. The core of this model is a first-order differential equation describing the evolution of non-thermal velocity dispersion. This equation is based on insights gained from observations, numerical simulations, and theory of turbulence. It describes that the...
18.
The Effects of Accretion History on the Cluster Temperature Profile and Cosmological Observables
Dr
Ian Parrish
(Canadian Institute for Theoretical Astrophysics)
14/08/2014, 11:00
Program
We have recently shown using a simple hydrostatic prescription and accretion histories from cosmological simulations that for a group or cluster of a given mass that there is a scatter of temperature and pressure profiles. In particular, we find that for almost every system, even in the presence of conduction and convection, that the temperature decreases outwards with a range of scatter...
Dr
Anders Pinzke
(Dark Cosmology Centre, University of Copenhagen)
14/08/2014, 11:25
Program
Observations of giant radio halos and radio relics in galaxy clusters demonstrate the presence of synchrotron emitting electrons with GeV energies in more than 50 clusters. The precise origin of these radio emitting electrons is, however, still unclear. In this talk I discuss two classes of cosmic ray models, hadronic and reacceleration, that can explan the origin of electrons in giant radio...
