  We present a careful study of accelerating black holes in anti-de Sitter
spacetime, formulating the thermodynamics and resolving discrepancies that have
appeared in previous investigations of the topic. We compute the dual
stress-energy tensor for the spacetime and identify the energy density
associated with a static observer at infinity. The dual energy-momentum tensor
can be written as a three-dimensional perfect fluid plus a non-hydrodynamic
contribution with a universal coefficient which is given in gauge theory
variables. We demonstrate that both the holographic computation and the method
of conformal completion yield the same result for the mass. We compare to
previous work on black funnels and droplets, showing that the boundary region
can be endowed with non-compact geometry, and comment on this novel holographic
dual geometry.
