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Comment: 8 pages, 3 figures, the version published in Phys.Rev.D
Comment: 13 pages, 8 figures, latex file. Talk given at XXIV Spanish Relativity Meeting E.R.E. 2006, to appear in Journal of Physics, Conference Series
We extend all known black hole no-hair theorems to space-times endowed with a positive cosmological constant $\Lambda.$ Specifically, we prove that static spherical black holes with $\Lambda>0$ cannot support scalar fields in convex potentials and Proca-massive vector fields in the region between black hole and cosmic horizons. We also demonstrate the existence of at least one type of quantum hair, and of exactly one charged solution for the Abelian Higgs model. Our method of proof can be applied to investigate other types of quantum or topological hair on black holes in the presence of a positive $\Lambda.$
Comment: 12 pages, 10 figures. Replaced with published version, including more discussion of convergence and properties of final hole
Comment: 8 pages, 1 figure
Comment: 33 pages, 14 figures
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