Résumé / Abstract Seminaire_GReCO

Séminaire / Seminar GReCO

« A Multiscale Physics Approach to Understanding Galaxy Evolution »

Greg Bryan
Joint Cosmology/GreCo seminar - Columbia University (New York, Etats-Unis d'Amérique)

The need for a comprehensive and predictive model for galaxy formation and evolution has never been greater: new and upcoming facilities will generate enormous amounts of cosmological-scale data, but using it to understand the fundamental physics of dark energy and matter will require advances in how we model such systems. I will describe an ambitious effort to do this, focusing in particular on recent advances in our understanding of the physics regulating galaxy formation and evolution. In particular, I will show how studying the small-scale processes involved in the interaction of hot winds and cold clouds has led us to a re-evaluation of how galaxy regulation actually occurs. In contrast to most large-scale cosmological simulations, I will make the case that supernovae in galaxies do not eject large quantities of mass out of galaxies, but instead generate low-mass loaded, high-specific energy winds that heat the surrounding gas, moving galaxy self-regulation out of the galaxy and into the circumgalactic medium.
mardi 7 février 2023 - 11:00
Salle des séminaires Évry Schatzman
Institut d'Astrophysique de Paris
Pages web du séminaire / Seminar's webpage