Inflating a chain of x-ray deficient bubbles by a single jet activity
  episode
  We show that a continuous jet with time-independent launching properties can
inflate a chain of close and overlapping X-ray deficient bubbles. Using the
numerical code PLUTO we run 2.5D (i.e. spherical coordinate system with
cylindrical symmetry) hydrodynamic simulations and study the interaction of the
jets with the intra-cluster medium (ICM). A key process is vortex fragmentation
due to several mechanisms, including vortex-shedding and Kelvin-Helmholtz (KH)
instabilities. Our results can account for the structure of two opposite chains
of close bubbles as observed in the galaxy cluster Hydra A. Our results imply
that the presence of multiple pairs of bubbles does not necessarily imply
several jet-launching episodes. This finding might have implications to
feedback mechanisms operating by jets.
