论文标题
红移Z〜8-15的Galaxy UV亮度功能的演变来自深处JWST和地面近红外成像
The evolution of the galaxy UV luminosity function at redshifts z ~ 8-15 from deep JWST and ground-based near-infrared imaging
论文作者
论文摘要
我们减少和分析了可用的James Webb太空望远镜（JWST）ERO和ERS NIRCAM成像（SMACS0723，玻璃，玻璃，Ceors），以及最新的Cosmos领域中最新的深地面近红外成像（Ultravista DR5提供），以产生不断发展的Galaxy Galaxy UV Luminsosity $ z = 8 $ z = lffift $ z = lffift $ z = lffift $ z = lffift $ z。这得出了对UV光度密度（$ρ_{\ rm UV} $）演变的新估计，以及因此宇宙星形构型密度（$ρ_{\ rm sfr} $）到$ <300 $ \ $ <300 $ \，大爆炸的myr。我们的结果证实，高红移LF最好由双重幂律（而不是schechter）功能最高来描述高达$ z \ sim10 $，并且LF和由此得出的$ρ_{\ rm uv} $（以及$ρ_ {\ rm sfr} $）的逐渐下降，以$ s SIMS逐渐下降，从而$ s Sim115 $（这项研究以一致的方式预先存在数据）。我们提供了61个高红移星系候选人的详细信息，其中47个是新的，这些候选者已实现了这一新分析。我们的样本包含6个星系，$ z \ ge 12 $，其中一种似乎是在$ z \ simeq 16.4 $中创建了新的红移记录，作为一个明显强大的星系候选者，因此我们详细考虑了其属性。这里提出的进步强调了在早期星系进化研究中实现高动态范围的重要性，并重新确立了即将实施更大的JWST计划来改变我们对年轻宇宙的理解的巨大潜力。
We reduce and analyse the available James Webb Space Telescope (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 ($ρ_{\rm UV}$), and hence cosmic star-formation rate density ($ρ_{\rm SFR}$) 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 $z\sim10$, and that the LF and the resulting derived $ρ_{\rm UV}$ (and thus $ρ_{\rm SFR}$), continues to decline gradually and steadily up to $z\sim15$ (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 $z \ge 12$, one of which appears to set a new redshift record as an apparently robust galaxy candidate at $z \simeq 16.4$, 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.
