Heronian elliptic curves and the size of the $2$-Selmer group

A generalization of the congruent number problem is to find positive integers $n$ that appear as the areas of Heron triangles. Selmer group of a congruent number elliptic curve has been studied quite extensively. Here, we look into the $2$-Selmer group structure for Heronian elliptic curves associated with Heron triangles of area $n$ and one of the angle $\theta$ such that $\tan \frac{\theta }{2}=n^{-1}$ and $n^2+1=2q$ for some prime $q$.