  We present density functional plus dynamical mean field studies of cubic
BaRuO$_3$ using interaction parameters previously found to be appropriate for
the related materials CaRuO$_3$ and SrRuO$_3$. The calculated variation in
transition temperature between the Ba and Sr compounds is consistent with
experiment, confirming the assignment of the compounds to the Hund's metal
family of materials, and also confirming the appropriateness of the values for
the interaction parameters previously estimated and the appropriateness of the
single-site dynamical mean field approximation for these materials. The results
provide insights into the origin of magnetism and the role of the van Hove
singularity in the physics of Hund's metals.
