What would a binary black hole merger look like?
Speaker
Carlos Herdeiro
Event date
Venue
GAP room
Event type
Strong Gravity News & Events
A first-order secular theory for the post-Newtonian two-body problem with spin: the restricted case
Speaker
Sante Carloni (CENTRA - IST)
Event date
Venue
GAP room
Event type
Abstract: We revisit the relativistic restricted two-body problem with spin employing a perturbation scheme based on Lie series. Starting from a post-Newtonian expansion of the field equations, we develop a first-order secular theory that reproduces well-known relativistic effects such as the precession of the pericentre and the Lense-Thirring and geodetic effects. Additionally, our theory takes into full account the complex interplay between the various relativistic effects, and provides a new explicit solution of the averaged equations of motion in terms of elliptic functions. Our analysis reveals the presence of particular configurations for which non-periodical behaviour can arise. The application of our results to real astrodynamical systems (such as Mercury-like and pulsar planets) highlights the contribution of relativistic effects to the long-term evolution of the spin and orbit of the secondary body.
Interview to Porto Canal
C. Herdeiro was the guest interviewee of Porto Canal's "Mentes que Brilham". Watch and listen to the conversation with interviewer Cláudia Fonseca about black holes and some of the research work made at Gr@v in this area.
New black holes in five dimensions
Speaker
James Lucietti (Edinburgh U.)
Event date
Venue
GAP room
Event type
Abstract: It has been known for some time that the black hole uniqueness theorem does not extend to higher dimensional spacetimes. I will argue that the classification of five dimensional asymptotically flat black hole solutions is far from complete, even for solutions with the same symmetry as the known spherical black holes and black rings.
Rotating black holes in a draining bathtub: superradiant scattering of gravity waves
Speaker
Carolina Benone
Event date
Venue
GAP room
Event type
Non-linear Q-clouds around Kerr black holes
Speaker
Helgi Rúnarsson
Event date
Venue
GAP room
Event type
Regge Quantum Gravity
Speaker
Aleksandar Mikovic (U. Lusófona and GFMUL)
Event date
Venue
GAP room
Event type
Abstract: We describe a new type of quantum gravity theory which is based on Regge formulation of General Relativity and the assumption that the spacetime is not a smooth manifold but a piec
VII Black Holes Workshop
Event date
Venue
Physics Amphitheatre
Ends on
Event Website
Event type
From astrophysics to high-energy physics, from information theory to quantum gravity, black holes have acquired an ever increasing role in fundamental physics, and are now part of the terminology of many important branches of observational, theoretical and mathematical physics. This workshop aims at bringing together experts about black holes in all their aspects.
The fourth edition of the Black Holes Workshop will be held at the University of Aveiro in 18-19 December 2014.
Searching for the first super-massive black holes
Speaker
Hugo Messias(Centro de Astronomia e Astrofísica da Universidade de Lisboa)
Event date
Venue
GAP room
Event type
Abstract: With the numerous pieces of evidence for the close evolution of super-massive black holes (SMBHs) and their host galaxies throughout the cosmic history, there has been a great effort to understand what drives such fact. One key point which could help achieve that goal is to observe the very first SMBHs in the early Universe and explore the initial conditions and what sets such co-evolution. This talk will guide you through the observational perspectives of this cosmic dance between SMBHs and their hosts, and the some alternative strategies to study them.