Smit Renske
Astrophysics Research Institute, Liverpool John Moores University (Liverpool, Royaume-Uni)
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
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| « The cold side of galaxy formation at the cosmic dawn » |
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Smit Renske |
| The study of galaxy formation in the first billion years (z>6) of cosmic time has recently seen a transformation due to the long-awaited data from the JWST. Galaxies that were first glimpsed by Hubble, now have measurements of star-formation, metal build-up and ionisation properties from emission lines emerging in hot, ionised gas. The physical processes underlying early star and galaxy formation, however, require understanding of the cold gas and dust in these systems, which can now be studied by combining state of the art data from ALMA and the JWST. In this talk I will present the latest ALMA results on the most distant galaxies out to z~14, our constraints to understand the build-up of the first dust reservoirs in galaxies z~7 and the dynamical state of the cold gas in these galaxies. I will show new results on the detection of the 2175A ‘UV bump’, that arises due to the presence of small carbonaceous dust grains (such as PAHs) and the constraints that we derive for the formation and growth of dust in the early Universe. I will furthermore talk about the formation of the first disk galaxies in the first billion years of cosmic time and the turbulence of the cold gas that has the potential to regulate star-formation activity in these early galaxies. |
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vendredi 26 juin 2026 - 11:00 Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |