%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