When does a right-angled Artin group split over $\mathbb{Z}$?

We show that a right-angled Artin group, defined by a graph $\mathrm{\Gamma }$ that has at least three vertices, does not split over an infinite cyclic subgroup if and only if $\mathrm{\Gamma }$ is biconnected. Further, we compute JSJ–decompositions of 1–ended right-angled Artin groups over infinite cyclic subgroups.