Recently in Phys. Rev. D 88, 027504 (2013), Yoon has suggested that there may be problems for the nonrelativistic limit of the conformal gravity theory. Here we show that Yoon’s results only hold because of the assumption that gravitational sources can be treated the same way that they are treated in standard Newton-Einstein gravity. Since such an assumption violates the theory’s underlying conformal invariance, Yoon’s conclusions are invalidated.

• Received 8 June 2015

DOI:https://doi.org/10.1103/PhysRevD.93.068501