Killing tensors in stationary and axially symmetric space-times

Understand

We discuss the existence of Killing tensors for certain (physically motivated) stationary and axially symmetric vacuum space-times.

• We show nonexistence of a nontrivial Killing tensor for a Tomimatsu-Sato metric (up to valence 7), for a C-metric (up to valence 9) and for a Zipoy-Voorhees metric (up to valence 11).
• The results are obtained by mathematically completely rigorous, nontrivial computer algebra computations with a huge number of equations involved in the problem.