Irreducible components of moduli spaces of maps to smooth projective toric varieties in genus 0

Abstract

We give a combinatorial description of the irreducible components of the moduli space $\overline{\mathcal{M}}_{0,n}(X,\beta)$ for a smooth projective toric variety $X$. The result is based on the study of the irreducible components of an abelian cone over a smooth Noetherian Artin stack. We give concrete applications of the result including $\overline{\mathcal{M}}_{0,0}(Bl_{pt} \mathbb{P}^2,2\ell)$, where we also describe the main component. This is the first example where the smoothable locus of $\overline{\mathcal{M}}_{g,n}(X,\beta)$ is described for $X$ not a projective space.