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Special Session SS9
3 July 2024
Dust enrichment of early galaxies (z>5) in the era of JWST and ALMA
The first billion years after the Big Bang witnessed the emergence of the first galaxies, whose stellar populations not only reionized the Universe, but also created the first heavy elements and dust. The rise of dust in the interstellar medium of galaxies plays a pivotal role in galaxy evolution as well as our understanding of this process. On the one hand, dust grains, by acting as catalysts for the formation of molecular hydrogen, by radiatively dissipating gravitational energy within collapsing clouds, and by shielding the molecules of these collapsing regions from the relentless emission of starlight, play a critical role in creating the physical conditions necessary for star formation. On the other hand, dust grains also play a somewhat detrimental role, obscuring our direct view of ongoing star formation, hampering our ability to study these fundamental processes. Until recently, the presence of dust and its role in the assembly of early galaxies was mainly studied through theoretical work. However, with the advent of the Atacama Large Millimeter/submillimeter Array (ALMA) and, more recently, the James Webb Space Telescope (JWST), we can now conduct detailed investigations on the dust content of primordial galaxies, either through its direct emission in the far-infrared, or through its imprint on the starlight of these galaxies. The recent discovery by JWST and ALMA of massive, optically dark, highly star-forming galaxies so early in the Universe as to challenge standard theories, undoubtedly highlights the synergy between these observatories. This new era of JWST and ALMA promises to shed ever more light on the complex processes governing the rise of dust in early galaxies and its profound consequences for their evolution.
Programme
Invited speakers In Progress... Scientific organisers
Benjamin Magnelli (DAp-AIM, CEA Paris-Saclay, France), Co-chair Contact
benjamin.magnelli@cea.fr Updated on Tue Jan 30 09:11:38 CET 2024
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European Astronomical Society |