J. Bicak et J. Podolsky, COSMIC NO-HAIR CONJECTURE AND BLACK-HOLE FORMATION - AN EXACT MODEL WITH GRAVITATIONAL-RADIATION, Physical review. D. Particles and fields, 52(2), 1995, pp. 887-895
Robinson-Trautman radiative space-times with a positive cosmological c
onstant are studied by analytical methods. They are shown to approach
the Schwarzschild-de Sitter solution at large retarded times. Their gl
obal structure is analyzed, and it is demonstrated that they represent
explicit models exhibiting the cosmic no-hair conjecture and black-ho
le formation under the presence of gravitational waves.