  Let $X,Y$ be algebraic varieties defined over $\Bbb R$. Assume $Y$ is smooth
and $X$ is Gorenstein. Suppose $\varphi:X\to Y$ is a flat $\Bbb R$-morphism
such that all the fibers have rational singularities. We show that the
pushforward of any smooth, compactly supported measure on $X$ has a continuous
density with respect to any smooth measure with non-vanishing density on $Y$.
This extends a result of Aizenbud and Avni from the $p$-adic case to the
archimedean case.

Algebraic Geometry