A lack of evolution in the very bright end of the galaxy luminosity function from z ≃ 8 to 10
A lack of evolution in the very bright end of the galaxy luminosity function from z ≃ 8 to 10
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DOI：
10.1093/mnras/staa313
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发表时间：
2019-11
影响因子：
4.8
通讯作者：
R. Bowler;M. Jarvis;M. Jarvis;J. Dunlop;R. McLure;D. McLeod;N. Adams;B. Milvang-Jensen;H. McCracken
中科院分区：
文献类型：
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作者：
R. Bowler;M. Jarvis;M. Jarvis;J. Dunlop;R. McLure;D. McLeod;N. Adams;B. Milvang-Jensen;H. McCracken
我们利用来自UltraVISTA第四次数据发布（DR4）的深近红外巡天数据和视频巡天数据，结合重叠的光学和斯皮策数据，寻找z≥7.5的明亮恒星形成星系。通过对搜索图像的~ 6 $\,{\rm°}^2$进行全光度红移拟合分析，我们发现27个莱曼破碎星系（LBGs），包括20个新源，在绝对紫外星等（- 23 < MUV < - 17）的大范围内，光度红移的最佳拟合范围为7.4 5。我们假设观测到的演化可以解释为在非常高的红移处缺乏质量淬火，以及在星系演化的第一个${\sim}1 \, {\rm Gyr}$中增加的尘埃遮挡。
We utilize deep near-infrared survey data from the UltraVISTA fourth data release (DR4) and the VIDEO survey, in combination with overlapping optical and Spitzer data, to search for bright star-forming galaxies at z ≳ 7.5. Using a full photometric redshift fitting analysis applied to the ∼6 $\, {\rm deg}^2$ of imaging searched, we find 27 Lyman break galaxies (LBGs), including 20 new sources, with best-fitting photometric redshifts in the range 7.4 5 data over a wide range in absolute UV magnitude (−23 < MUV < −17). We postulate that the observed evolution can be explained by a lack of mass quenching at very high redshifts in combination with increasing dust obscuration within the first ${\sim}1 \, {\rm Gyr}$ of galaxy evolution.