In this note, we consider the motion of a solid body in an incompressible perfect fluid filling the plane. We prove the global existence of solutions in the case where the initial vorticity belongs to $L^p$ with $p\gt 1$ and is compactly supported. We do not assume that the energy is finite.
"Low regularity solutions for the two-dimensional "rigid body + incompressible Euler" system." Differential Integral Equations 27 (7/8) 625 - 642, July/August 2014.