One points out that a metric used as a General Relativity filled by a massless scalar $\phi$ solution in several studies, and that would have been a generalization of the Janis-Newman-Winicour spherical solution to the rotating case, does not solve the corresponding Einstein equation $R_{ab}={\partial }_a\phi {\partial }_b\phi$. As a consequence, the (conformally related) Krori-Bhattacharjee spacetime is not a vacuum Brans-Dicke solution.

• Received 7 May 2018

DOI:https://doi.org/10.1103/PhysRevD.98.088501