Central engine or locomotive

Abstract

The astrophysical aspects of proposals of escape of supermassive blackholes from galactic nuclei and their implications in relation to quasars are discussed. We conclude that high velocity recoil of the central engine can at best be considered an exception rather than a rule since it requires a violent release of mass energy in an asymmetrical manner, spectacular in nature. However, scope for the concept of low velocity motion in the inner regions of the host galaxy exists in view of some recent observations