Comment on Phys.Rev. Lett. {\bf 122}, 084501 (2019) by A. Esposito, R. Krichevsky and A. Nicolis

Abstract

This is a comment on the PRL: Gravitational mass $M$ carried by sound waves by A. Esposito, R. Krichevsky and A. Nicolis, Phys.Rev. Lett. {\bf 122}, 084501 (2019).

1 page, one figure. Submitted as a Comment to Phys. Rev. Lett