Sandro Tacchella
Kavli Institute for Cosmology Cambridge, University of Cambridge (Cambridge, Royaume-Uni)
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
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| « The vigorous growth of early galaxies » |
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Sandro Tacchella |
| After successful deployment and commissioning, JWST has now been delivering data for nearly two years. I will give an overview of the first-year surprises and discoveries, zooming in on some of the earliest galaxies and presenting new results on the spatially resolved growth histories of high-redshift galaxies. Specifically, I will discuss the structural and stellar population properties of the galaxies at the redshift frontier, with redshifts z>10. I will then connect the mode of star formation with the early enrichment of galaxies: for galaxies where we have constraints on the gas-phase metallicity (at redshift of z=8), I will show how star-bursting galaxies can have different gas-phase metallicities due to internal and external mechanisms that drive the starburst. Finally, I will focus on the structural evolution of galaxies, presenting how dense stellar cores form within galaxies at z>7. I will wrap up by highlighting what JWST will be able to deliver regarding the black hole - galaxy co-evolution in the upcoming years. |
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vendredi 31 mai 2024 - 11:00 Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |