1Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching, Germany, heinzs@mpa-garching.mpg.de

2Dept. of Physics and CAIS, Ewha University, Seoul 120-750, Korea

3Center for High Energy Physics, Kyungpook National University, Daegu 702-701, Korea

4JILA, Campus Box 440, University of Colorado, Boulder CO 80309, Hubble Fellow

5Dept. of Astronomy, University of Maryland, College Park MD 20742

6Dept. of Astrophysical and Planetary Sciences, University of Colorado, Boulder CO 80309

Abstract:

We present Chandra observations of the galaxy cluster A4059. We find strong evidence that the FR-I radio galaxy PKS 2354-35 at the center of A4059 is inflating cavities with radii $\sim 20{\rm\thinspace kpc}$ in the intracluster medium (ICM), similar to the situation seen in Perseus A and Hydra A. We also find evidence for interaction between the ICM and PKS 2354-35 on small scales in the very center of the cluster. Arguments are presented suggesting that this radio galaxy has faded significantly in radio power (possibly from an FR-II state) over the past $10^8{\rm\thinspace yr}$.

galaxies:jets, galaxies:clusters:individual (Abell 4059), hydrodynamics, X-rays: galaxies: clusters