Black Holes in Higher Dimensions (Black Strings and Black Rings)

Abstract

The last three years have again seen new exciting developments in the area of higher dimensional black objects. For black objects with noncompact higher dimensions, the solution space was exlored further within the blackfold approach and with numerical schemes, yielding a large variety of new families of solutions, while limiting procedures created so-called super-entropic black holes. Concerning compact extra dimensions, the sequences of static nonuniform black strings in five and six dimensions were extended to impressively large values of the nonuniformity parameter with extreme numerical precision, showing that an oscillating pattern arises for the mass, the area or the temperature, while approaching the conjectured double-cone merger solution. Besides the presentation of interesting new types of higherdimensional solutions, also their physical properties were addressed in this session. While the main focus was on Einstein gravity, a significant number of talks also covered Lovelock theories.

The Self-Deployment of Worlds on the Other Side of the Big Bang

“…Solving this problem can clarify a lot in our understanding of the birth and evolution of the Universe and is an open problem. Here we can focus on the study [35], where, in multidimensional space, singular solutions for configurations in the form of black strings, black rings and multiple black holes are considered. The paper uses the inverse scattering problem method to obtain regular solutions without naked singularities, closed time-like curves and Dirac-Misner strings [36].…”