Séminaire/Seminar Galaxies |
| « COSMOS-Web: stellar mass assembly since z=10 » |
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Marko Shuntov |
| COSMOS-Web is the widest contiguous JWST survey of over 0.5 deg^2 in four NIRCam and one MIRI filter. In order to carry out galaxy evolution studies it is neccessary to exploit the wealth of ground- and space-based multi-band photometric data in COSMOS to tightly sample the SED of galaxies from the UV to MIR. This talk will present the galaxy catalogs of photometry, morphology and physical parameters from over 30 photometric bands in the COSMOS-Web survey. These catalogs are made from parametric model-fitting of every detected source in COSMOS-Web to simultaneously and accurately measure total photometry in images from JWST, HST, VISTA, HSC and CFHT. Finally, this talk will present first results on the stellar mass assembly in the first 2 Gyr in the Universe. These measurements corroborate the enhanced number densities of massive galaxies and a double-power law behaviour of the stellar mass functions at z>4. There results are compared with predictions from simulations to interpret the possible physical mechanisms that give rise to the observed abundances of massive galaxies in the early Universe. |
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jeudi 11 avril 2024 - 11:30 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |