Strong Gravity News & Events

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The Einstein-Yang-Mills anti-de Sitter menagerie

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Speaker
Elizabeth Winstanley (Sheffield U.)
Event date
Venue
GAP room
Event type
Seminars

Abstract: Spherically symmetric black hole solutions of Einstein-Yang-Mills (EYM) theory have been studied for 25 years.  In the past 15 years there has been a particular focus on EYM black holes in anti-de Sitter space (adS) since, unlike the situation in asymptotically flat space, in adS stable hairy EYM black holes exist.

Strong Gravity

Introduction to Numerical Relativity

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Speaker
Juan Carlos Degollado
Event date
Venue
GAP room
Ends on
Event type
Courses
Numerical Relativity has become one of the most powerful probes of relativistic space times. It allows us to recreate phenomena that are otherwise inaccessible in the laboratory. One of the main applications of numerical relativity is the study of astrophysical systems that involve strong and highly dynamical gravitational fields, such as, for example, black holes and neutrons stars. In this basic introduction we will review the fundamental concepts that underlie the field as well as some of its most important applications.
Strong Gravity

Superradiant instabilities of black holes

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Speaker
Sam Dolan (Sheffield U.)
Event date
Venue
GAP room
Event type
Seminars

Abstract: Rapidly-spinning black holes can actually *increase* their event horizon area, and hence their entropy, by shedding mass and angular momentum. This thermodynamic statement underpins various energy-extraction mechanisms, such as the Penrose process, or the stimulated emission of radiation known as superradiance.

Strong Gravity