ProFuse：镓的物理多带结构分解和质量-尺寸-年龄平面
ProFuse: Physical Multi-Band Structural Decomposition of Galaxies and the Mass-Size-Age Plane
摘要：
我们提出了新的PROWITOR包，一个同时光谱（紫外到远红外）和空间结构分解工具，产生星系及其组件的物理模型。它结合了最近发布的ProFound（用于自动源提取）、ProFit（用于扩展源剖析）和ProSpect（用于恒星星族建模）软件包的功能。Proximity的关键新颖之处在于，它使用自洽模型分别为凸起和盘的恒星形成和金属丰度历史生成图像，并使用一系列波长范围内的目标图像来定义模型可能性并优化我们的物理星系重建。论文的第一部分详细探讨了Prosthetic方法，并将结果与已发表的结构和恒星星族特性进行了比较。本文的后半部分将Proximity应用于6，664个z < 0.06的GAMA星系。使用重新处理的ugriZYJHKs成像，我们提取的结构和恒星星族并行的凸起和磁盘的属性。以及生产真正的恒星质量为基础的质量大小的关系，我们进一步扩展这种相关性，探索年龄和气相金属丰度的第三个维度。特别是在一个明确定义的平面上，在给定的圆盘恒星质量下，年轻的圆盘往往更大，这些圆盘表现出很强的质量-尺寸-年龄之间的相互依赖性。这些发现与高红移的工作基本一致，表明早期形成的圆盘在物理上更小。
英文摘要：
We present the new ProFuse R package, a simultaneous spectral (ultraviolet to far infrared) and spatial structural decomposition tool that produces physical models of galaxies and their components. This combines the functionality of the recently released ProFound (for automatic source extraction), ProFit (for extended source profiling) and ProSpect (for stellar population modelling) software packages. The key novelty of ProFuse is that it generates images using a self-consistent model for the star formation and metallicity history of the bulge and disk separately, and uses target images across a range of wavelengths to define the model likelihood and optimise our physical galaxy reconstruction. The first part of the paper explores the ProFuse approach in detail, and compares results to published structural and stellar population properties. The latter part of the paper applies ProFuse to 6,664 z < 0.06 GAMA galaxies. Using re-processed ugriZYJHKs imaging we extract structural and stellar population properties for bulges and disks in parallel. As well as producing true stellar mass based mass-size relationships, we further extend this correlation to explore the third dimensions of age and gas phase metallicity. The disks in particular demonstrate strong co-dependency between mass-size-age in a well defined plane, where at a given disk stellar mass younger disks tend to be larger. These findings are in broad agreement with work at higher redshift suggesting disks that formed earlier are physically smaller.
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