| Autor: |
Donnan, C T, McLeod, D J, Dunlop, J S, McLure, R J, Carnall, A C, Begley, R, Cullen, F, Hamadouche, M L, Bowler, R A A, Magee, D, McCracken, H J, Milvang-Jensen, B, Moneti, A, Targett, T |
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| Zdroj: |
Monthly Notices of the Royal Astronomical Society; Feb2023, Vol. 518 Issue 4, p6011-6040, 30p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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