Dynamical Horizons in Binary Black Hole Mergers
Seminar
QUEST Center event
No
Speaker
Daniel Pook-Kolb, Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut)
Date
17/12/2020 - 20:30 - 19:00Add to Calendar
2020-12-17 19:00:00
2020-12-17 20:30:00
Dynamical Horizons in Binary Black Hole Mergers
Marginally outer trapped surfaces (MOTSs) are the main tool in numerical relativity to infer properties of black holes in simulations of dynamical systems. In this talk, I will present results that show how we can understand a merger of two black holes in terms of the evolution of these MOTSs. This closes a gap in our understanding of binary-black-hole mergers and provides the quasilocal analog of the famous "pair-of-pants" picture of the event horizon of two merging black holes. In particular, we will encounter three new phenomena: (i) the merger of MOTSs, (ii) the formation of self-intersecting MOTSs immediately after this merger, and (iii) a non-monotonicity result for the area of certain smoothly evolving MOTSs. Finally, I will show a remarkable correspondence between the evolution of the horizon geometry at late times and the quasi-normal modes which describe the ringdown signal measurable by far away observers.
The seminar will be hosted on Zoom: https://zoom.us/j/9290951953
The talk's start time is 17:00 Jerusalem time, but we'll start gathering 30 minutes earlier for informal chat
Zoom
המחלקה לפיזיקה
physics.dept@mail.biu.ac.il
Asia/Jerusalem
public
Place
Zoom
Abstract
Marginally outer trapped surfaces (MOTSs) are the main tool in numerical relativity to infer properties of black holes in simulations of dynamical systems. In this talk, I will present results that show how we can understand a merger of two black holes in terms of the evolution of these MOTSs. This closes a gap in our understanding of binary-black-hole mergers and provides the quasilocal analog of the famous "pair-of-pants" picture of the event horizon of two merging black holes. In particular, we will encounter three new phenomena: (i) the merger of MOTSs, (ii) the formation of self-intersecting MOTSs immediately after this merger, and (iii) a non-monotonicity result for the area of certain smoothly evolving MOTSs. Finally, I will show a remarkable correspondence between the evolution of the horizon geometry at late times and the quasi-normal modes which describe the ringdown signal measurable by far away observers.
The seminar will be hosted on Zoom: https://zoom.us/j/9290951953
The talk's start time is 17:00 Jerusalem time, but we'll start gathering 30 minutes earlier for informal chat
תאריך עדכון אחרון : 17/11/2020
