Black holes as local horizons
نویسنده
چکیده
This talk gives a brief introduction to black hole horizons and their role in black hole thermodynamics. In particular a distinction is made between quasilocally defined horizons and event horizons. Currently some new techniques have led to interesting developments and the field seems to be growing in two distinct directions. We will show how thermodynamics can equally well be applied to locally defined horizons and discuss some recent results. The emphasis is on giving simple intuitive pictures and mathematical details are largely omitted.
منابع مشابه
Black hole boundaries
Classical black holes and event horizons are highly non-local objects, defined in relation to the causal past of future null infinity. Alternative, quasilocal characterizations of black holes are often used in mathematical, quantum, and numerical relativity. These include apparent, killing, trapping, isolated, dynamical, and slowly evolving horizons. All of these are closely associated with two...
متن کاملqc / 0 50 40 87 v 2 2 9 Ju n 20 05 Thermodynamics of de Sitter black holes with a conformally coupled scalar field
We study the thermodynamics of de Sitter black holes with a conformally coupled scalar field. The geometry is that of the “lukewarm” Reissner-Nordström-de Sitter black holes, with the event and cosmological horizons at the same temperature. This means that the region between the event and cosmological horizons can form a regular Euclidean instanton. The entropy is modified by the non-minimal co...
متن کاملIsolated and Dynamical Horizons and Their Applications
Over the past three decades, black holes have played an important role in quantum gravity, mathematical physics, numerical relativity and gravitational wave phenomenology. However, conceptual settings and mathematical models used to discuss them have varied considerably from one area to another. Over the last five years a new, quasi-local framework was introduced to analyze diverse facets of bl...
متن کاملFundamental properties and applications of quasi-local black hole horizons
The traditional description of black holes in terms of event horizons is inadequate for many physical applications, especially when studying black holes in non-stationary spacetimes. In these cases, it is often more useful to use the quasi-local notions of trapped and marginally trapped surfaces, which lead naturally to the framework of trapping, isolated and dynamical horizons. This framework ...
متن کامل0 Geometric characterisations of the Kerr isolated horizon
The quasi-local theory of black-holes uses isolated horizons, rather then entire space-times. Each isolated horizon is described by its geometry: the induced metric and parallel transport. The space of the geometries is infinite dimensional. On the other hand, the isolated horizons defined by the Kerr metric form a 2-dimensional subfamily. In this letter we derive geometric conditions on an iso...
متن کامل