%0 Journal Article %T The evolution of the galaxy UV luminosity function at redshifts z ≃ 8 - 15 from deep JWST and ground-based near-infrared imaging %+ Institut d'Astrophysique de Paris (IAP) %A Donnan, C. T. %A Mcleod, D. J. %A Dunlop, J. S. %A Mclure, R. J. %A Carnall, A. C. %A Begley, R. %A Cullen, F. %A Hamadouche, M. L. %A Bowler, R. A. A. %A Magee, D. %A Mccracken, H. J. %A Milvang-Jensen, B. %A Moneti, A. %A Targett, T. %< avec comité de lecture %@ 0035-8711 %J Monthly Notices of the Royal Astronomical Society %I Oxford University Press (OUP): Policy P - Oxford Open Option A %V 518 %P 6011-6040 %8 2023 %D 2023 %Z 2207.12356 %Z 2023MNRAS.518.6011D %R 10.1093/mnras/stac3472 %K galaxies: evolution %K galaxies: formation %K galaxies: high-redshift %K Astrophysics - Astrophysics of Galaxies %Z Sciences of the Universe [physics]Journal articles %X We reduce and analyse the available JWST ERO and ERS NIRCam imaging (SMACS0723, GLASS, CEERS) in combination with the latest deep ground-based near-infrared imaging in the COSMOS field (provided by UltraVISTA DR5) to produce a new measurement of the evolving galaxy UV luminosity function (LF) over the redshift range z = 8 - 15. This yields a new estimate of the evolution of UV luminosity density (ρUV), and hence cosmic star formation rate density (ρSFR) out to within <300 Myr of the Big Bang. Our results confirm that the high-redshift LF is best described by a double power law (rather than a Schechter) function up to z ~ 10, and that the LF and the resulting derived ρUV (and thus ρSFR), continues to decline gradually and steadily up to z ~ 15 (as anticipated from previous studies which analysed the pre-existing data in a consistent manner to this study). We provide details of the 61 high-redshift galaxy candidates, 47 of which are new, that have enabled this new analysis. Our sample contains 6 galaxies at z ≥ 12, one of which appears to set a new redshift record as an apparently robust galaxy candidate at z ≃ 16.4, the properties of which we therefore consider in detail. The advances presented here emphasize the importance of achieving high dynamic range in studies of early galaxy evolution, and re-affirm the enormous potential of forthcoming larger JWST programmes to transform our understanding of the young Universe. %G English %2 https://insu.hal.science/insu-03947312/document %2 https://insu.hal.science/insu-03947312/file/stac3472.pdf %L insu-03947312 %U https://insu.hal.science/insu-03947312 %~ INSU %~ CNRS %~ IAP %~ SORBONNE-UNIVERSITE %~ SORBONNE-UNIV %~ SU-SCIENCES %~ SU-TI %~ ALLIANCE-SU