| Type |
Conference Paper |
| Names |
Samuel H. Friedman, S. Heinz |
| Proceedings Title |
Bulletin of the American Astronomical Society |
| Conference Name |
American Astronomical Society, AAS Meeting #215, #436.18 |
| Volume |
42 |
| Pages |
387 |
| Date |
January 1, 2010 |
| Short Title |
Heating the Intracluster Medium |
| URL |
http://adsabs.harvard.edu/abs/2010AAS...21543618F |
| Library Catalog |
NASA ADS |
| Abstract |
Recent observations of galaxy clusters show that temperatures of the
intracluster medium (ICM) lie in the range of 10-100 million K. We would
expect this gas to cool via radiative cooling; however, we do not
observe this cooling. One way of keeping the ICM hot involves the
coupling of jets emanating from supermassive black holes at the centers
of galaxies within the cluster with the ICM. The energies involved in
the bubbles that these jets inflate in the ICM can provide sufficient
energy to heat the gas. However, we do not know how the jet energy
becomes thermalized; we present a mechanism that will thermalize the jet
energy. The jets have a duty cycle which can cause a shock wave to run
across a previously inflated underdense bubble in the ICM. The resulting
instability (Richtmyer-Meshkov) causes energy from the shock/jet to
transform into rotational kinetic energy, which can then thermalize
through turbulence and viscosity. We present the results of shock/bubble
interactions with 2D and 3D hydrodynamic and magnetohydrodynamic (MHD)
simulations. |