| Friday 27 December 2024 | |
| Events for day: Wednesday 19 June 2024 |
| 09:00 - 15:00 Workshop Fundamentals of Brain MRI School COGNITIVE SCIENCES Fundamentals of Brain MRI - Workshop ... 13:30 - 15:00 A magnetic massive star has experienced a stellar merger School ASTRONOMY Massive stars (those ?8 solar masses at formation) have radiative envelopes that cannot sustain a dynamo, the mechanism that produces magnetic fields in lower-mass stars. Despite this, approximately 7% of massive stars have observed magnetic fields, the origin of which is debated. We used multi- epoch interferometric and spectroscopic observations to characterize HD 148937, a binary system of two massive stars. We found that only one star is magnetic and that it appears younger than its companion. The system properties and a surrounding bipolar nebula can be reproduced with a model in which two stars merged (in a previous triple system) to pr ... 16:00 - 17:00 Mathematics Colloquium Quantization of Laplacian on graded Lie groups School MATHEMATICS Quantum mechanics emerged as a revolutionary theory that classical physics could not fully explain, particularly at the submicroscopic scale. The shift to quantum mechanics challenged classical beliefs, notably with Heisenberg?s Uncertainty Principle, which established an inherent limit on the precision of measuring operators like position and momentum. Quantum mechanics also introduced the idea of superposition, where particles can exist in multiple states simultaneously until measured, at which point they collapse into a single state. The Heisenberg groups H^n are a significant and simple example of a noncommutative graded Lie group, illust ... |