论文标题
早期的宇宙是尘土飞扬的，非常热
The early Universe was dust-rich and extremely hot
论文作者
论文摘要
我们通过将111227物体堆叠在最近发布的宇宙目录中的地图上的波长上，将111227的物体堆叠在早期宇宙中的星系中的尘埃特性和星系特性，并研究了灰尘发射的峰值。我们发现红移8的远红外光度密度升高，表明早期宇宙中的灰尘丰富。我们进一步发现，红移的尘埃温度升高，在Z〜7时达到100 +-12 K，这表明存在源自人口II星的硅酸盐粉尘，或者是仅仅是年轻的热星之外的加热来源。最后，我们试图了解如何在以前的调查中错过这些对象，以及如何设计观察值以针对它们。所有代码，指向数据的链接以及完整复制这项研究的说明位于https://github.com/marcoviero/simstack3/上。
We investigate the dust properties and star-formation signature of galaxies in the early universe by stacking 111227 objects in the recently released COSMOS catalogue on maps at wavelengths bracketing the peak of warmed dust emission. We find an elevated far-infrared luminosity density to redshift 8, indicating abundant dust in the early universe. We further find an increase of dust temperature with redshift, reaching 100 +- 12 K at z ~ 7, suggesting either the presence of silicate rich dust originating from Population II stars, or sources of heating beyond simply young hot stars. Lastly, we try to understand how these objects have been missed in previous surveys, and how to design observations to target them. All code, links to the data, and instructions to reproduce this research in full are located at https://github.com/marcoviero/simstack3/.
