The profile of the fluorescent iron line from black hole accretion disks is a powerful diagnostic properties, such as spin and inclination. state-of-the-art, however, considers an disk whose angular momentum aligned with that hole; this very constraining assumption which unlikely to apply many or even most astrophysical systems. Here, we present first simulation reflection spectrum warped using...

I examine the pair creation of black holes in spacetimes with a cosmological constant of either sign. I consider cosmological C-metrics and show that the conical singularities in this metric vanish only for three distinct classes of black hole metric, two of which have compact event horizons on each spatial slice. One class is a generalization of the Reissner-Nordstrom (anti) de Sitter black ho...