Évènements

Ludovic van Waerbake (U. of British Columbia, Canada) The discovery of cosmic acceleration established dark energy as one of the central problems in cosmology. In the standard cosmological model, dark energy is described by a cosmological constant, yet its extremely small value remains difficult to reconcile with expectations from quantum field theory. Recent DESI results, […]

Claudio Ricci (U. Geneva) Accreting supermassive black holes are known to be variable, changing in brightness across all wavelengths and timescales. In recent years, a remarkable subset of these Active Galactic Nuclei (AGN) has been discovered to show extreme spectral variability. These changing-look events are thought to arise from extreme and rapid changes in how […]