We present new physical properties for an extreme (L _IR > 10¹³ L _⊙), unlensed dusty star-forming galaxy at z = 4.531, G09-81106. We compile fluxes from the literature, and include new Hubble Space Telescope data to generate SED models under various assumptions. G09-81106 has a number of physical characteristics that far surpass the average data for DSFGs, including high dust temperature (∼70 K) and star formation rate ( > 2 10³ M _⊙ yr⁻¹). While barely within the average star-forming main sequence region, G09 is already an order of magnitude more massive and more star-forming than most star-forming galaxies at similar epochs. Visual inspection suggests these exceptional properties may be due to an ongoing merger, though future work with spatially resolved imaging and spectroscopic analysis will reveal its true nature.

我们在z  = 4.531, G09-81106_处展示了一个极端 ( L _IR  > 10 ¹³ L⊙ )、无透镜尘埃恒星形成星系的新物理性质。我们从文献中编译通量，并包括新的哈勃太空望远镜数据以在各种假设下生成 SED 模型。G09-81106 具有许多远远超过 DSFG 平均数据的物理特性，包括高尘埃温度 (~70 K) 和恒星形成率 ( > 2 ^{10 3} M⊙ _yr -1 ）。尽管 G09 几乎不在平均恒星形成主序带区域内，但其质量和恒星形成量已经比类似时期的大多数恒星形成星系大一个数量级。目视检查表明这些特殊特性可能是由于正在进行的合并，尽管未来空间分辨成像和光谱分析的工作将揭示其真实性质。