2024 CAP Congress / Congrès de l'ACP 2024

Session

(DTP) F1-1 Black Holes II | Trous noirs II (DPT)

F1-1

31 May 2024, 09:00

Western University

Conveners

(DTP) F1-1 Black Holes II | Trous noirs II (DPT)

• Ivan Booth

4464. The Dynamics of Black Hole Horizons

Robie Hennigar (ICCUB, Universitat de Barcelona)

31/05/2024, 09:00

Theoretical Physics / Physique théorique (DTP-DPT)

Invited Speaker / Conférencier(ère) invité(e)

Black holes are perhaps the most enigmatic objects in nature. They are the end point of dying stars, form the central core of most galaxies, and can collide to produce ripples in space and time that we know as gravitational radiation. A key property of a black hole is its horizon — the boundary that separates the black hole from the rest of the universe. Understanding the physics of horizons...

4253. Exotic Marginally Outer Trapped Surfaces are unstable

Juan Margalef (Memorial University)

31/05/2024, 09:30

Theoretical Physics / Physique théorique (DTP-DPT)

Oral (Non-Student) / Orale (non-étudiant(e))

Black holes stand as enigmatic phenomena within our universe, yet their precise definition presents a big challenge. The original definitions are only useful in static situations since they rely on global properties (we need to know the history of the whole universe to detect a black hole!). Marginally outer trapped surfaces (MOTS) were introduced in an effort to provide a quasilocal...

4504. (G) Temporary horizons: the life and times of a quantum black hole

Samantha hergott (York University / Perimeter Institute for Theoretical Physics)

31/05/2024, 09:45

Theoretical Physics / Physique théorique (DTP-DPT)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

I will discuss a class of time-dependent, asymptotically flat and spherically symmetric metrics which model gravitational collapse in quantum gravity developed by myself and the other listed authors. Motivating the work was the intuition that quantum gravity should not exhibit curvature singularities and indeed, the metrics lead to singularity resolution with horizon formation and evaporation...

4333. Gravitational Solitons in Anti-de Sitter Spacetimes

Turkuler Durgut

31/05/2024, 10:00

Theoretical Physics / Physique théorique (DTP-DPT)

Oral (Non-Student) / Orale (non-étudiant(e))

Gravitational solitons are globally stationary, geodesically complete spacetimes with positive energy. Interestingly, they do not have an event horizon, and according to the Lichnerowicz Theorem, no such electrovacuum solutions exist in four dimensions. In this talk, I will introduce a family of gravitational solitons in anti-de Sitter spacetimes. I will explain their geometric and...