舔盘子埋藏在 ALMA 校准数据中的尘埃状恒星形成星系

Jianhang Chen, R. Ivison, M. Zwaan, C. Péroux, A. Biggs
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引用次数: 0

摘要

深入、无偏见的观测对于解读星系的宇宙演化至关重要。亚毫米(submm)和毫米(mm)窗口是对紫外/光学波段的补充,也是揭示冷宇宙和尘埃宇宙的关键。进行深度巡天的传统方法要么采用透镜场,要么以小区域为目标进行超长积分。这些巡天极大地推进了我们对尘埃星形成星系(DSFGs)的了解,但容易受到透镜不确定性和宇宙变异的影响,而且扩展成本高昂。在此,我们总结了最近对ALMA定标附近DSFG的多波长巡天:ALMACAL巡天。这些场已经积累了数百小时的上源时间,达到的深度和有效区域可与定制的宇宙学勘测相媲美。我们总结了 ALMACAL 的多波长数量计数,以及从亚毫米波长到毫米波长的宇宙红外背景(CIB)的解析部分。与此同时,将每个波段所有可用的ALMA观测数据结合在一起,可以获得令人印象深刻的频率覆盖范围,通常可以得到这些DSFG的红移。ALMACAL 勘测证明了对现有和计划中的所有亚毫米/毫米和射电望远镜进行校准扫描的科学价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Licking the plate: Dusty star-forming galaxies buried in the ALMA calibration data
Deep, unbiased surveys are essential to decipher the cosmic evolution of galaxies. The submillimetre (submm) and millimetre (mm) windows complement the UV/optical waveband and are key to revealing the cold and dusty Universe. Traditional ways of conducting deep surveys resort to either lensed fields or target small areas for ultra-long integrations. These surveys have greatly advanced our understanding of dusty star-forming galaxies (DSFGs), but are susceptible to lensing uncertainties and cosmic variance and will be expensive to expand. Here, we summarise our recent multi-wavelength survey of DSFGs in the vicinity of ALMA’s calibrators: the ALMACAL survey. These fields have accumulated many hundreds of hours of on-source time, reaching depths and effective areas that are competitive with bespoke cosmological surveys. We summarise the multi-wavelength number counts from ALMACAL and the resolved fraction of the Cosmic Infrared Background (CIB) from submm to mm wave-lengths. Meanwhile, combining all available ALMA observations in each field results in impressive frequency coverage, which often yields the redshifts of these DSFGs. The ALMACAL survey has demonstrated the scientific value of calibration scans for all submm/mm and radio telescopes, existing and planned.
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