Welcome address

• François Bouchet et Fabienne Casoli

Seeing Through CCC (Black holes)

• Roger Penrose (Univ. Oxford)

Coalescing Binary Black Holes and Gravity Beyond General Relativity (Black holes)

• Thibault Damour (IHES)

Brandon Carter and black holes (Black holes)

• Piotr Chruściel (Univ. Vienna)

Brandon Carter is one of the fathers of modern black hole theory. In my talk I will present some of his key contributions to the topic.

Soft Black Hole Hair (Black holes)

• Malcolm Perry (Univ. Cambridge)

Super-massive black hole formation from superconducting strings (Cosmic strings and branes)

• Robert Brandenberger (McGill University)

Scaling laws for global defects in cosmology (Cosmic strings and branes)

• Ruth Durrer (Univ. Genève)

Thermodynamics with Strings and Walls - a Brandon tribute! (Cosmic strings and branes)

• Ruth Gregory (King's College, London)

Cosmic Vortons and Particle Physics Constraints with Brandon (Cosmic strings and branes)

• Anne Davis (Univ. Cambridge)

Stable cosmic vortons in field theory (Cosmic strings and branes)

• Richard Battye (Univ. Manchester)

From vortons to gravitational wave constraints on cosmic strings (Cosmic strings and branes)

• Danièle Steer (APC)

CVOS model for superconducting cosmic strings (Cosmic strings and branes)

• Paul Shellard (Univ. Cambridge)

Congratulations and Some Happy Memories (Black holes)

• Kip Thorne (CalTech)

Doomsday revisited: concise anthropic history of our genus Homo (Anthropic principle)

• Brandon Carter (LUTH, Obs. Paris)

Astrobiological evolution and the number of critical steps: reasons for (cautious) optimism? (Anthropic principle)

• Milan Ćirković (Astron. Obs. Belgrade)

The Anthropic Principle: 50 Years On (Anthropic principle)

• Bernard Carr (Queen Mary Univ.)

Counterfactual universes: smooth, rough or nuclear-free (Anthropic principle)

• Martin Rees (Univ. Cambridge)

Bayesian Reasoning: from the Carter Catastrophe to Testing the No-Hair Theorem (Anthropic principle)

• Reinhard Prix (AEI Hannover)

Relativistic fluids with a twist (Neutron star interiors)

• Nils Andersson (Univ. Southampton)

Neutron stars and the dense matter equation of state (Neutron star interiors)

• Micaela Oertel (LUTH, Obs. Paris)

Superfluid dynamics in neutron stars (Neutron star interiors)

• Nicolas Chamel (Université Libre de Bruxelles)

Two discs and a missing triangle: the maximally extended Kerr black hole revisited (Black holes)

• Malcolm MacCallum (Queen Mary Univ.)

Symmetry operatotrs and separation of variables for the Dirac equation (Black holes)

• Ray McLenaghan (University of Waterloo)

Binary Black Hole Inspiral (Black holes)

• Luc Blanchet (IAP)

Binary black hole astrophysics (Black holes)

• Jean-Pierre Lasota (IAP)

Compact objects in modified gravity (Black holes)

• David Langlois (APC)

Constructing scalar tensor black holes from Kerr geodesics (Black holes)

• Christos Charmousis (IJCLab)

Brandon, Dirac and Fermi (Black holes)

• Cédric Deffayet (IAP)

Inflationary cosmic hair (Black holes)

• Alexei Starobinsky (Landau Institute for Theoretical Physics RAS)

Carter’s inspirations : from BKL conjecture to Stellar Pancakes (Black holes)

• Jean-Pierre Luminet (LAM)

As a beginning researcher I had the chance to benefit from Brandon's wise advice for my early work, from my 1977 thesis on cosmological singularities that he directed to his suggestion to numerically visualize black holes in 1978. Then we could fully collaborate from 1982 to 1986 in a series of pioneering papers on the modelisation of tidal disruption of stars by big black holes.

A visual journey into some Carter-Penrose diagrams

• Alain Riazuelo (IAP, CNRS, Sorbonne Université)

Although it looks simple, the Schwarzschild metric describes a complicated spacetime that is endowed with two asymptotic regions and two singularities. The situation is even more complicated for charged or spinning black holes. Grasping the complexity of these metrics can fortunately be achieved thanks to the celebrated Carter-Penrose diagrams. However, such diagrams do not allow to guess the complexity of the actual visual aspect of these metrics, that is, how a set of celestial spheres are distorted in the presence of strong gravitational fields. Conversely, addressing this issue necessitates to propagate geodesics in metrics that, most of the time, cannot be covered by a unique coordinate system and for which locating photons and oneself in a causal diagram is mandatory. In this talk, I will show a few movies of what an observer would see when travelling within a few black hole metric maximal analytic extensions: Schwarzschild, Reissner-Nordström and, of course, Kerr.

Probing supermassive compact objects with GRAVITY and the EHT

• Frederic Vincent