A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX Atlas of Local Galaxies
A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX Atlas of Local Galaxies
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DOI：
10.3847/1538-4365/ab3925
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
A. Leroy;K. Sandstrom;D. Lang;A. Lewis;S. Salim;E. Behrens;J. Chastenet;I. Chiang 江;M. Gallag
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文献类型：
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作者：
A. Leroy;K. Sandstrom;D. Lang;A. Lewis;S. Salim;E. Behrens;J. Chastenet;I. Chiang 江;M. Gallag
我们提出了一个图集的紫外线和红外线图像的15,750本地（d 50 Mpc）星系，由美国宇航局的宽视场红外巡天探测器（WISE）和星系演化探测器（GALEX）任务观察。这些地图具有匹配的分辨率（FWHM 7.“5和15”），匹配的天体测量学，以及背景去除的通用程序。我们证明，他们同意以及解决强度测量和综合测光从以前的调查。这个图集代表了一个计划（z = 0多波长星系合成）的第一部分，该计划旨在创建一个大型的，统一的数据库，用于对附近星系中的气体和尘埃进行分辨测量。这些图像和相关目录将在NASA/IPAC红外科学档案馆公开提供。该图集使我们能够以统一的方式估计局部星系群中的局部和综合星星形成率（SFR）和恒星质量（M）。在附录中，我们使用Salim等人的总体合成拟合来校准基于GALEX和WISE的综合M估计和SFR估计。因为它们利用了基于斯隆数字巡天（SDSS）的训练集，该训练集包含> 100，000个星系，因此这些校准具有很高的精度，并允许我们将本地星系与SDSS结果进行严格的比较。我们提供了这些SFR和M的估计，我们的样本中的所有星系，并表明我们的结果产生了一个“主序列”的恒星形成星系与以前的工作。我们还显示了NUV到WISE 1与WISE 1到WISE 3空间中解析星系的强度分布，这捕获了这些波段访问的大部分关键物理。
We present an atlas of ultraviolet and infrared images of ∼15,750 local (d ≲ 50 Mpc) galaxies, as observed by NASA’s Wide-field Infrared Survey Explorer (WISE) and Galaxy Evolution Explorer (GALEX) missions. These maps have matched resolution (FWHM 7.″5 and 15″), matched astrometry, and a common procedure for background removal. We demonstrate that they agree well with resolved intensity measurements and integrated photometry from previous surveys. This atlas represents the first part of a program (the z = 0 Multiwavelength Galaxy Synthesis) to create a large, uniform database of resolved measurements of gas and dust in nearby galaxies. The images and associated catalogs will be publicly available at the NASA/IPAC Infrared Science Archive. This atlas allows us estimate local and integrated star formation rates (SFRs) and stellar masses (M⋆) across the local galaxy population in a uniform way. In the appendix, we use the population synthesis fits of Salim et al. to calibrate integrated M⋆ and SFR estimators based on GALEX and WISE. Because they leverage a Sloan Digital Sky Survey (SDSS)-based training set of >100,000 galaxies, these calibrations have high precision and allow us to rigorously compare local galaxies to SDSS results. We provide these SFR and M⋆ estimates for all galaxies in our sample and show that our results yield a “main sequence” of star-forming galaxies comparable to previous work. We also show the distribution of intensities from resolved galaxies in NUV-to-WISE1 versus WISE1-to-WISE3 space, which captures much of the key physics accessed by these bands.