Irreducible modules of toroidal Lie algebras arising from $φ_ε$-coordinated modules of vertex algebras

Abstract: In this paper, for every $\epsilon\in \mathbb{Z}$, we introduce an extension of the 2-toroidal Lie algebra by certain derivations. Based on the $\phi_\epsilon$-coordinated modules theory for vertex algebras, we give an explicit realization of a class of irreducible highest weight modules for this extended toroidal Lie algebra. When $\epsilon=1$, this affords a realization of certain irreducible modules for the toroidal extended affine Lie algebras first constructed by Billig.