Constraining the thermal dust content of Lyman break galaxies in an overdense field at z˜ 5 Thermal dust in z~ 5 LBGs
Constraining the thermal dust content of Lyman break galaxies in an overdense field at z˜ 5 Thermal dust in z~ 5 LBGs
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约束 zË 5 过密场中莱曼断裂星系的热尘埃含量 z~ 5 LBG 中的热尘埃
DOI：
10.1111/j.1745-3933.2010.00912.x
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Stanway E
中科院分区：
文献类型：
--
作者：
Stanway E
我们已经在J1040.7−1155场中进行了870 μm的观测，已知该场中有一个过密度的莱曼破裂星系atz= 5.16 ± 0.05。我们在S870 μm= 3.0 mJy束流−1（2σ）水平上没有探测到任何单独的源。9个光谱确认的z> 5星系的叠加也产生了不可探测性，限制了一个典型星系在这个红移到S870 μm< 0.85 mJy的亚毫米通量，这对应于质量极限M dust < 1.2 × 108 M <$（2σ）。这限制了遥远的莱曼破裂星系中热尘的质量，使其小于典型恒星质量的十分之一。我们没有看到与紫外线选择的星系过密度相关的强大亚毫米星系的证据，但不能排除存在较暗，质量较小的来源。
We have carried out 870-μm observations in the J1040.7−1155 field, known to host an overdensity of Lyman break galaxies atz= 5.16 ± 0.05. We do not detect any individual source at theS870 μm= 3.0 mJy beam−1(2σ) level. A stack of nine spectroscopically confirmedz> 5 galaxies also yields a non-detection, constraining the submillimetre flux from a typical galaxy at this redshift toS870 μm< 0.85 mJy, which corresponds to a mass limitMdust< 1.2 × 108M⊙(2σ). This limits the mass of thermal dust in distant Lyman break galaxies to less than one-tenth of their typical stellar mass. We see no evidence for strong submillimetre galaxies associated with the ultraviolet-selected galaxy overdensity, but cannot rule out the presence of fainter, less massive sources.