| Speaker: | Marco Limongi (National Institute for Astrophysics) |
|---|---|
| Title: | Presupernova Evolution of Massive Stars: Current Status and Open Questions |
| Date (JST): | Tue, Nov 26, 2024, 13:30 - 14:30 |
| Place: | Seminar Room A |
| Abstract: |
Massive stars, by which we mean those stars evolving through all the stable nuclear burning stages, play a fundamental role in the evolution of the Universe. Therefore, a good knowledge of how they evolve is required in order to shed light on many topical subjects like, e.g., the chemical evolution of the galaxies and the nature of the sources of gravitational waves. In the last years three main questions – still debated – rose in the community working on massive stars. They concern: (1) the compactness of massive stars at the presupernova stage as an indicator of their explodability, (2) the nature of the remnant after the explosion, and in particular the maximum mass of a stellar black hole, and (3) the so called “Red Supergiant (RSG) problem”, i.e. the lack of observed supernovae associated with the observed most luminous RSGs. In this seminar, I will address these questions by firstly reviewing our current understanding of the presupernova evolution of massive stars. |
