On the Monodromy and Galois Group of Conics Lying on Heisenberg Invariant Quartic K3 Surfaces

Abstract

In "Curves on Heisenberg invariant quartic surfaces in projective 3-space", Eklund showed that a general $(\mathbb{Z}/2\mathbb{Z}{)}^4$-invariant quartic K3 surface contains at least $320$ conics. In this paper we analyse the field of definition of those conics as well as their Monodromy group. As a result, we prove that the moduli space $(\mathbb{Z}/2\mathbb{Z}{)}^4$-invariant quartic K3 surface with a marked conic has $10$ irreducible components.

18 pages