Belgian Gravitational-Wave Meeting (ULB/VUB), Nov 3, 2021

Session

Early Universe cosmology and Black Hole Theory

3 Nov 2021, 16:10

Salle Solvay (Plaine, bât NO, 5th floor) (ULB)

18. Ringing of rotating black holes in higher derivative gravity

Kwinten Fransen (KULeuven)

03/11/2021, 16:10

Rotating black holes in general relativity are notoriously simple objects. They can be fully fixed by measuring a single dominant (complex) characteristic frequency. Having determined this 'quasinormal mode' (QNM) frequency for the endstate of a binary merger, any additional information, from earlier binary dynamics or other QNMs, can serve as a test of our understanding of general relativity...

19. Observable effects of equatorial symmetry breaking for EMRIs

Daniel Mayerson

03/11/2021, 16:30

Equatorial symmetry – flipping the sign of the z coordinate – is a somewhat accidental symmetry of the Kerr black hole. There is no theorem guaranteeing its existence for a stationary black hole, as opposed to axisymmetry. Indeed, in many string theory black holes and horizonless compact objects, equatorial symmetry is generically broken. Somehow surprisingly, however, the possible observable...

20. Exploring the early Universe with numerical General Relativty

Cristian Joana

03/11/2021, 16:50

In this talk, I will motivate the usage of numerical relativity for studies on the early universe. In particular, I will show simulations of the preinflationary epoch to prove the robustness of Higgs inflation to inhomogeneous initial conditions. Also, I will show ongoing preliminary results: full GR simulation of the reheating, and investigations on primordial black hole formation during the...