Oscar Agertz
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
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| « Early Galactic Discs and Their Connections to Present-Day Galaxies » |
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Oscar Agertz |
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Recent JWST and ALMA observations have revealed that a substantial fraction of galaxies at very high redshift are rotationally supported discs. Many of these systems host kinematically cold, or “settled,” gaseous discs, a finding that stands in tension with the expectations of many galaxy formation models. In this seminar, I will present an overview of cosmological simulations of disc galaxy formation. I will discuss the properties of gas-rich, high-redshift discs , their turbulent nature, and how these early phases of disc assembly connect to spectroscopic and astrometric observations of the Milky Way. Finally, I will show new results indicating that turbulent, early-Universe galaxies are more susceptible to global gravitational instabilities, such as bar formation, than previously thought. These results carry important implications for the rapid buildup of galactic bulges and the fueling of central black holes.
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vendredi 9 octobre 2026 - 11:00 Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |