Conveners
Tuesday afternoon
- Alexander Schekochihin (University of Oxford)
Prof.
James Stone
(Princeton University)
8/12/14, 1:45 PM
Program
The intracluster medium (ICM) of galaxy clusters is a weakly collisional plasma in which the transport of heat and momentum occurs primarily along magnetic-field lines. Anisotropic heat conduction allows convective instabilities to be driven by temperature gradients of either sign: the magnetothermal instability (MTI) in the outskirts of clusters and the heat-flux buoyancy-driven instability...
Mr
Thomas Berlok
(NBIA)
8/12/14, 2:10 PM
Program
Understanding whether Helium can sediment to the core of galaxy clusters is important for a number of problems in cosmology and astrophysics. For example, our ignorance in the distribution of Helium leads to systematic uncertainties in estimating the density and masses of galaxy clusters. All current models addressing this question are one-dimensional, and ignore the fact that the intracluster...
Dr
Elke Roediger
(Hamburger Sternwarte)
8/12/14, 3:05 PM
Program
The ICM transport properties (viscosity, thermal conductivity) and magnetic field structure are still ill-constrained. We use the ICM flows around gas-stripped elliptical cluster galaxies and in merging clusters as direct probes of these ICM properties. Galaxies moving through the ICM experience a head wind that strips off their gaseous atmospheres. The structure of the galaxy-ICM interface...
Mark Voit
(Michigan State University)
8/12/14, 3:30 PM
Program
Observational surveys seeking to measure evolution in the incidence and properties of cool cores in galaxy clusters have obtained seemingly contradictory results. Some claim to detect evolution. Others find no evolution. Reconciling these observations requires a closer look at how cool cores are defined and the physics that governs their characteristics.
