Strong Gravity News & Events

Enter words that may appear in the title

Dual-Frame Generalized Harmonic Gauge on Hyperboloidal Slices

Speaker
David Hilditch (Instituto Superior Tecnico - Lisbon)
Event date
Venue
On campus (Mathematics Department, amphitheater Sousa Pinto) + Zoom
Event type

Both for studies of cosmic censorship and for practical purposes in gravitational wave astronomy, it is desirable to include future null-infinity in the computational domain. Extending formulations of general relativity known to behave well in the strong-field regime out to infinity with compactification is, however, a subtle game.

Dynamical friction from scalar dark matter

Speaker
Dina Traykova (Albert Einstein Institute)
Event date
Venue
online (only)
Event type

Despite the plethora of evidence of the existence and abundance of dark matter we have from large scale cosmological observations, there is still little we know of its properties or its behaviour on small scales. A promising way to test this is through the effects it may have on the gravitational wave signal from black hole binary mergers.

Separating Astrophysics and Geometry in Black Hole Images

Speaker
Guillermo Lara (SISSA and IFPU, Trieste)
Event date
Venue
online (only)
Event type

The observation of the shadow of the supermassive black hole M87∗ by the Event Horizon Telescope (EHT) is sensitive to the spacetime geometry near the circular photon orbit and beyond, and it thus has the potential to test general relativity in the strong field regime.