Hyperboloidal strong field initial data and 3D progress with BSSN/Z4

Alex Vañó Viñuales (U de Les Illes Balears)

Jan 16. 2026, 10:00 — 10:30

Gravitational wave radiation is only unambiguously defined at future null infinity -- the "location"  where global properties of spacetimes can be measured, and also the correct idealization of astrophysical observers. Reaching future null infinity is thus crucial for extracting correct waveforms from numerical relativity simulations of compact binaries, and evolution on hyperboloidal slices -- spacelike, smooth and extending to null infinity -- is a very promising avenue to achieve this. Among current efforts to the hyperboloidal method, I will focus on free evolution of the conformally compactified BSSN / Z4 equations. In this talk I will cover hyperboloidal initial data including black holes and neutron stars in spherical symmetry and ongoing efforts towards simulations in full 3D in this approach. 

Further Information
Venue:
ESI Boltzmann Lecture Hall
Recordings:
Recording
Associated Event:
Hyperboloidal Foliations and their Application (Workshop)
Organizer(s):
Roland Donninger (U of Vienna)
David Hilditch (IST Lisboa)
Maciej Maliborski (TU Wien)
Rodrigo Panosso Macedo (NBI, Copenhagen)
Alex Vañó Viñuales (U de Les Illes Balears)
Anil Colpan Zenginoglu (U of Maryland)