Clusters of galaxies are the most massive bound structures in
the Universe. They are dark matter dominated (84%), and harbour
several hundreds of galaxies that bathe in a hot diffuse intra-
cluster medium (ICM). Temperatures of the ICM range between tens
of million degrees to hundreds of million degrees. Galaxy
clusters are also the most luminous extended X-ray sources in
the sky. A key question in large scale structure formation is
how the delicate heating and cooling balance, commonly termed
feedback, in these vast objects evolves and is maintained. The
current paradigm is that cooling is regulated by the active
galactic nucleaus (AGN) within the central cluster galaxies. A
striking feature observed in low redshift galaxy clusters, is
the large X-ray cavities being blown into the ICM by the central
active galactic nucleus. These cavities, also known as bubbles,
are filled with radio emitting particles. The energy stored
within them is substantial, and is sufficient to prevent the gas
from cooling. The X-ray