A limit on the number density of bright z â?? 7 galaxies
A limit on the number density of bright z â?? 7 galaxies
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明亮 z 的数密度的限制 �??
DOI:
10.1111/j.1365-2966.2008.13030.x
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发表时间:
2008
影响因子:
4.8
通讯作者:
Stanway E
中科院分区:
文献类型:
--
作者:
Stanway E
We present a survey of bright optical dropout sources in two deep, multiwavelength surveys comprising 11 widely separated fields, aimed at constraining the galaxy luminosity function atz≈ 7 for sources at 5–10L* (z= 6). Our combined survey area is 225 arcmin2to a depth ofJAB= 24.2 (3σ) and 135 arcmin2toJ= 25.3 (4σ). We find that infrared data longwards of 2 μm are essential for classifying optical dropout sources, and in particular for identifying cool Galactic star contaminants. Our limits on the number density of high-redshift sources are consistent with current estimates of the Lyman break galaxy luminosity function atz= 6.