F & H monopoles

Supersymmetric monopoles of the heterotic string theory associated with an arbitrary non-negative number of the left-moving modes of the string states are presented. They include H-monopoles and their T-dual partners F-monopoles (ALE instantons). Massive F = H monopoles are T-self-dual. Solutions include also an infinite tower of generic T-duality covariant non-singular in stringy frame F & H monopoles with the bottomless throat geometry. The massless F = - H monopoles are invariant under combined T-duality and charge conjugation converting a monopole into antimonopole. All F & H monopoles can be promoted to the exact supersymmetric solutions of the heterotic string theory since the holonomy group is the compact SO(9). The sigma models for M⁸ monopoles, which admit constant complex structures, have enhanced world-sheet supersymmetry: (4,1) in general and (4,4) for the left-right symmetric monopoles. The space-time supersymmetric GS light-cone action in monopole background is directly convertible into the world-sheet supersymmetric NSR action.