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We consider electrically neutral complex vector particles $V$ below the GeVmass scale that, from a low energy perspective, couple to the photon via higherdimensional form factor interactions. We derive ensuing astrophysicalconstraints by considering the anomalous energy loss from the Sun, HorizontalBranch, and Red Giant stars as well as from SN1987A that arise from vectorpair-production in these environments. Under the assumption that the darkstates $V$ constitute dark matter, the bounds are then complemented by directand indirect detection as well as cosmological limits. The relic density fromfreeze-out and freeze-in mechanisms is also computed. On the basis of aUV-complete model that realizes the considered effective couplings, we alsodiscuss the naturalness of the constrained parameter space, and provide ananalysis of the zero mass limit of $V$.

Multipole vector dark matter below the GeV-scale