Holomorphic Poisson manifolds and holomorphic Lie algebroids

We study holomorphic Poisson manifolds and holomorphic Lie algebroids from the viewpoint of real Poisson geometry. We give a characterization of holomorphic Poisson structures in terms of the Poisson Nijenhuis structures of Magri-Morosi and describe a double complex that computes the holomorphic Poisson cohomology. A holomorphic Lie algebroid structure on a vector bundle A → X is shown to be equivalent to a matched pair of complex Lie algebroids (T ^0.1 X, A^1'0), in the sense of Lu. The holomorphic Lie algebroid cohomology of Ais isomorphic to the cohomology of the elliptic Lie algebroid T^0.1 X A^1'0. In the case when (X, π) is a holomorphic Poisson manifold and A = (T* X)_π, such an elliptic Lie algebroid coincides with the Dirac structure corresponding to the associated generalized complex structure of the holomorphic Poisson manifold.