Recognition of the role of radio galaxies in the universe has been increasing in recent years. Their colossal energy output over huge volumes is now widely believed to play a key role not only in the formation of galaxies and their supermassive black holes, but also in the evolution of clusters of galaxies and, possibly, the cosmic web itself. In this regard, we need to understand the in ation of radio bubbles in the hot gas atmospheres of clusters and the importance of the role that radio galaxies play in the overall energy budget of the intracluster medium. Here, we present results from X-ray and radio band observations of the hot gas atmospheres of powerful, nearby radio galaxies in poor clusters.

ABSTRACT
1. INTRODUCTION
    1.1. Low-/High-excitation Radio Galaxies
    1.2. Emission Processes
2. RADIO AND X-RAY STUDY OF RADIO GALAXIES
3. RADIO GALAXY
    3.1. Jet Emission
    3.2. Radio Lobe Emission
    3.3. Radio Galaxy Interaction with the Hot Gas Environment
4. LOOKING AHEAD
REFERENCES

• Dharam V. Lal(National Centre for Radio Astrophysics (TIFR), Pune University Campus, Ganeshkhind P.O.)