  The Fanaroff-Riley class II radio galaxy Cygnus A hosts jets which produce
radio emission, X-ray cavities, cocoon shocks, and X-ray hotspots where the jet
interacts with the ICM. Surrounding one hotspot is a peculiar "hole" feature
which appears as a deficit in X-ray emission. We use relativistic hydrodynamic
simulations of a collimated jet interacting with an inclined interface between
lobe and cluster plasma to model the basic processes which may lead to such a
feature. We find that the jet reflects off of the interface into a broad,
turbulent flow back out into the lobe, which is dominated by gas stripped from
the interface at first and from the intracluster medium itself at later times.
We produce simple models of X-ray emission from the ICM, the hotspot, and the
reflected jet to show that a hole of emission surrounding the hotspot as seen
in Cygnus A may be produced by Doppler de-boosting of the emission from the
reflected jet as seen by an observer with a sight line nearly along the axis of
the outgoing material.
