GRAPPA Colloquia 2025-26




Date Speaker Host @ GRAPPA Title Abstract Affiliation Location
15/09/2025 David Radice Philipp Moesta Neutron Star Mergers: to Collapse or not to Collapse? Neutron star mergers act as Nature's ultimate supercolliders, where two massive objects—each with ~10^58 nucleons—collide at a quarter of the speed of light. The outcome of these mergers, whether a black hole is formed, and, if so, how quickly, is reflected in their gravitational waves and electromagnetic signals. I will discuss the physics involved in black hole formation and how it can be proved with observations. Finally, I will highlight the future potential of next-generation gravitational-wave experiments and the theoretical challenges that must be addressed to maximize their scientific impact. Department of Physics, Penn State, USA C4.174, GRAPPA, Science Park 904, Amsterdam
14/10/2025 Anna Watts Philipp Moesta Mapping neutron stars – inside and out Neutron stars have a rich and fascinating phenomenology. Their supranuclear density cores contain matter of incredible neutron-richness, and they may harbor stable states of strange matter. They have solid crusts threaded by the strongest magnetic fields in the Universe, and oceans where runaway thermonuclear reactions can lead to powerful explosions. Using X-ray astronomy and General Relativity, we are starting to map these stars, inside and out — generating new insight into both stellar evolution and fundamental physics. Astronomical Institute Anton Pannekoek, University of Amsterdam, The Netherlands C4.174, GRAPPA, Science Park 904, Amsterdam
28/10/2025
11/11/2025 Amina Helmi Youyou Li TBA TBA Kapteyn Astronomical Institute, Groningen, The Netherlands C4.174, GRAPPA, Science Park 904, Amsterdam
25/11/2025
09/12/2025 Damiano Fiorillo Youyou Li TBA TBA Astroparticle Theory, DESY, Germany C4.174, GRAPPA, Science Park 904, Amsterdam
13/01/2026
27/01/2026 Béatrice Bonga Rodrigo Vicente TBA TBA Radboud University, The Netherlands C4.174, GRAPPA, Science Park 904, Amsterdam
10/02/2026
24/02/2026
10/03/2026
24/03/2026
14/04/2026
28/04/2026
12/05/2026
26/05/2026
09/06/2026
23/06/2026