Rapid growth of superradiant instabilities for charged black holes in a cavity
Speaker
Helgi Rúnarsson
Event date
Venue
GAP room
Event type
Strong Gravity News & Events
Numerical relativity simulations of binary neutron stars and collapsars
Speaker
José Antonio Font (Valencia U.)
Event date
Venue
GAP room
Event type
Abstract: This talk presents a brief overview of numerical relativity simulations of two scenarios of relativistic astrophysics which are among the most important sources of gravitational radiation.
Holographic superconductors: effect of backreaction
Speaker
Betti Hartmann (Jacobs U.)
Event date
Venue
GAP room
Event type
Abstract: The gauge/gravity duality has been used to describe so-called holographic superconductors and superfluids with the help of black holes and solitons in Anti-de Sitter space-time. In this talk, I will mainly discuss holographic superconductors and superfluids away from the probe limit, i.e. taking backreaction of the space-time into account.
Honorable Mention in 2014 GRF Essay Competition
The Essay "A new spin on black hole hair", by C. Herdeiro and E. Radu, was selected for an "Honorable Mention" in the Gravity Research Foundation 2014 Awards for Essays on Gravitation. The first prize was awarded to M. Krauss and (Nobel Laureate) F. Wilczek, for the essay "From B-modes to Quantum Gravity and Unification of Forces". See the list of all prized essays here.
Kerr black holes with scalar hair
"Black holes have no hair" - is a famous `mantra' coined by John Wheeler in 1971, to express that astrophysical black holes should all have very similar physical properties. In a paper to appear in Physical Review Letters, however, Gr@v researchers C. Herdeiro and E. Radu showed that actually astrophysical black holes need not be bald!
Extremal and non-extremal black hole scattering in string theory
Speaker
Filipe Moura (Minho U.)
Event date
Venue
GAP room
Event type
Abstract: We obtain a general formula for the low frequency absorption cross section of spherically symmetric black holes in d dimensions including leading string-theoretical alpha'-corrections.
Award for Mengjie Wang
Mengjie Wang, Ph.D. student at Gr@v, has received a "Chinese Government Award for outstanding self-financed students abroad", granted by the Ministry of Education of China. Congratulations Mengjie!
Backreaction in warped compactifications of supersymmetric
Speaker
Bert Janssen (Granada U.)
Event date
Venue
GAP room
Event type
Abstract: We discuss the importance backreaction in flux compactifications of 10-dimensional supergravity. We will review the ideas of flux compactifications and construct exact backreacted solutions, using the concrete example of supersymmetric domain wall in 7-dimensional gauged supergravity.
Kerr black holes with scalar hair
Speaker
Carlos Herdeiro
Event date
Venue
GAP room
Event type
Superradiant instability of black holes immersed in a magnetic field
Speaker
Richard Brito (CENTRA - IST)
Event date
Venue
GAP room
Event type
Abstract: Superradiance is a radiation enhancement process that involves dissipative systems. In General Relativity, black-hole superradiance is permitted by dissipation at the event horizon that allows for energy and angular momentum extraction from the vacuum, even at the classical level.