An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: source catalogue and properties
An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: source catalogue and properties
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DOI：
10.1093/mnras/stz1536
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发表时间：
2019-03
影响因子：
4.8
通讯作者：
S. Stach;U. Dudzevivciut.e;I. Smail;A. Swinbank;J. Geach;J. Simpson;F. An;O. Almaini;V. Arumugam;A. Blain;S. Chapman;C. C. Chen-C.;C. Conselice;E. Cooke;K. Coppin;E. D. Cunha;J. Dunlop;D. Farrah;B. Gullberg;J. Hodge;R. Ivison;D. Kocevski;M. Michałowski;T. Miyaji;D. Scott;A. Thomson;J. Wardlow;A. Weiss;P. University;U. Hertfordshire;Asiaa;Purple Mountain Observatory;U. Nottingham;Eső;U. Edinburgh;U. Leicester;D. University;A. N. University;U. Hawaii;Leiden University;Colby College;Adam Mickiewicz University;Unam;U. Columbia;U. Manchester;L. University;Max-Planck Institut
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文献类型：
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作者：
S. Stach;U. Dudzevivciut.e;I. Smail;A. Swinbank;J. Geach;J. Simpson;F. An;O. Almaini;V. Arumugam;A. Blain;S. Chapman;C. C. Chen-C.;C. Conselice;E. Cooke;K. Coppin;E. D. Cunha;J. Dunlop;D. Farrah;B. Gullberg;J. Hodge;R. Ivison;D. Kocevski;M. Michałowski;T. Miyaji;D. Scott;A. Thomson;J. Wardlow;A. Weiss;P. University;U. Hertfordshire;Asiaa;Purple Mountain Observatory;U. Nottingham;Eső;U. Edinburgh;U. Leicester;D. University;A. N. University;U. Hawaii;Leiden University;Colby College;Adam Mickiewicz University;Unam;U. Columbia;U. Manchester;L. University;Max-Planck Institut
我们目前的目录和属性的来源在AS 2UDS，870-$\mu$m连续调查与阿塔卡马大型毫米/亚毫米阵列（阿尔马）的716个单碟亚毫米源在UKIDSS/UDS领域检测到的SCUBA-2宇宙学遗产调查。在我们灵敏的阿尔马后续观测中，我们发现了708个亚毫米星系（SMG），它们在直径为1度的视场中具有4.3sigma显著性。我们将联合收割机精确的阿尔马位置与UDS场中广泛的多波长覆盖范围相结合，以拟合SMG的光谱能量分布，得出中值红移为z_{\rm phot}= 2.61\pm$0.09。这个大样本揭示了一个统计上显着的趋势，增加亚毫米流量与红移暗示星系缩小。101张阿尔马图没有显示出一个> 4.3sigma的SMG，但是我们从这些位置的SPIRE观测的叠加中证明，这些空白图中的绝大多数对应于真实的单碟亚毫米源。我们进一步表明，这些空白的地图包含一个多余的星系在$z_{\rm phot}=$\，1.5 - 4相比，随机场，类似于ALMA探测到的SMG的红移范围。此外，我们将联合收割机X射线和中红外活跃星系核活动（AGN）指标结合起来，得出样本中AGN分数的可能范围为8--28\，\ %。最后，我们比较了这一人口的高红移，强烈的恒星形成星系的红移与推断的大质量，被动星系的形成红移被发现到$z\sim $\，2，找到合理的协议-在支持这两类大质量星系之间的进化联系。
We present the catalogue and properties of sources in AS2UDS, an 870-$\mu$m continuum survey with the Atacama Large Millimetre/sub-millimetre Array (ALMA) of 716 single-dish sub-millimetre sources detected in the UKIDSS/UDS field by the SCUBA-2 Cosmology Legacy Survey. In our sensitive ALMA follow-up observations we detect 708 sub-millimetre galaxies (SMGs) at $>$\,4.3$\sigma$ significance across the $\sim$\,1-degree diameter field. We combine our precise ALMA positions with the extensive multi-wavelength coverage in the UDS field to fit the spectral energy distributions of our SMGs to derive a median redshift of $z_{\rm phot}=$\,2.61$\pm$0.09. This large sample reveals a statistically significant trend of increasing sub-millimetre flux with redshift suggestive of galaxy downsizing. 101 ALMA maps do not show a $>$\,4.3$\sigma$ SMG, but we demonstrate from stacking {\it Herschel} SPIRE observations at these positions, that the vast majority of these blank maps correspond to real single-dish sub-millimetre sources. We further show that these blank maps contain an excess of galaxies at $z_{\rm phot}=$\,1.5--4 compared to random fields, similar to the redshift range of the ALMA-detected SMGs. In addition, we combine X-ray and mid-infrared active galaxy nuclei activity (AGN) indicators to yield a likely range for the AGN fraction of 8--28\,\% in our sample. Finally, we compare the redshifts of this population of high-redshift, strongly star-forming galaxies with the inferred formation redshifts of massive, passive galaxies being found out to $z\sim$\,2, finding reasonable agreement -- in support of an evolutionary connection between these two classes of massive galaxy.