The Complete Redshift Distribution of Dusty Star-forming Galaxies from the SPT-SZ Survey
The Complete Redshift Distribution of Dusty Star-forming Galaxies from the SPT-SZ Survey
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DOI：
10.3847/1538-4357/abb599
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发表时间：
2020-06
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通讯作者：
C. Reuter;J. Vieira;J. Spilker;A. Weiss;M. Aravena;M. Archipley;M. Béthermin;S. Chapman;S. Chapman;S. Chapman;C. Breuck;Chenxing Dong;W. Everett;J. Fu;T. Greve;T. Greve;C. Hayward;R. Hill;Y. Hezaveh;S. Jarugula;K. Litke;M. Malkan;D. Marrone;D. Narayanan;D. Narayanan;K. Phadke;A. Stark;M. Strandet
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作者：
C. Reuter;J. Vieira;J. Spilker;A. Weiss;M. Aravena;M. Archipley;M. Béthermin;S. Chapman;S. Chapman;S. Chapman;C. Breuck;Chenxing Dong;W. Everett;J. Fu;T. Greve;T. Greve;C. Hayward;R. Hill;Y. Hezaveh;S. Jarugula;K. Litke;M. Malkan;D. Marrone;D. Narayanan;D. Narayanan;K. Phadke;A. Stark;M. Strandet
南极望远镜（SPT）在2500平方度的宇宙学毫米波巡天中系统地识别了81个高红移、强引力透镜、尘埃恒星形成星系（DSFG）。我们提出了最终的光谱红移调查的通量限制（S870 μm > 25 mJy）的样品，最初选择在1.4毫米。红移调查进行了阿塔卡马大型毫米/亚毫米阵列在3毫米光谱窗口，目标是一氧化碳线发射。通过将这些测量与辅助数据相结合，SPT样本现在在光谱上是完整的，红移跨越1.9 5，使其成为迄今为止最大的高红移DSFG样本，并使极亮DSFG的“高红移尾”得以测量。虽然星系形成模型很难解释SPT红移分布，但来自这个完整且定义明确的调查的更大样本统计数据将有助于为未来的理论工作提供信息。
The South Pole Telescope (SPT) has systematically identified 81 high-redshift, strongly gravitationally lensed, dusty star-forming galaxies (DSFGs) in a 2500 square degree cosmological millimeter-wave survey. We present the final spectroscopic redshift survey of this flux-limited (S870 μm > 25 mJy) sample, initially selected at 1.4 mm. The redshift survey was conducted with the Atacama Large Millimeter/submillimeter Array across the 3 mm spectral window, targeting carbon monoxide line emission. By combining these measurements with ancillary data, the SPT sample is now spectroscopically complete, with redshifts spanning 1.9 5, making this the largest sample of high-redshift DSFGs to date, and enabling the “high-redshift tail” of extremely luminous DSFGs to be measured. Though galaxy formation models struggle to account for the SPT redshift distribution, the larger sample statistics from this complete and well-defined survey will help inform future theoretical efforts.