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arXiv 2102.08414astro-ph.GAcs.CV
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Galaxy Zoo DECaLS:志愿者的详细视觉形态测量和深度学习,用于314,000个Galerkin

Galaxy Zoo DECaLS: Detailed Visual Morphology Measurements from Volunteers and Deep Learning for 314,000 Galaxies

University of Oxford(牛津大学);European Space Agency(欧洲空间局);University of Portsmouth(朴茨茅斯大学);University of Minnesota(明尼苏达大学);University of Nottingham(诺丁汉大学);Princeton University(普林斯顿大学)
Mike Walmsley, Chris Lintott, Tobias Geron, Sandor Kruk, Coleman Krawczyk, Kyle W. Willett, Steven Bamford, Lee S. Kelvin, Lucy Fortson, Yarin Gal, William Keel… 展开作者

Mike Walmsley, Chris Lintott, Tobias Geron, Sandor Kruk, Coleman Krawczyk, Kyle W. Willett, Steven Bamford, Lee S. Kelvin, Lucy Fortson, Yarin Gal, William Keel, Karen L. Masters, Vihang Mehta, Brooke D. Simmons, Rebecca Smethurst, Lewis Smith, Elisabeth M. Baeten, Christine Macmillan

摘要:

我们提出银河动物园装饰:SDSS DR 8足迹内星系的暗能量相机遗产调查图像的详细视觉形态分类。更深的DECaLS图像(r=23.6与SDSS的r=22.2)显示了螺旋臂、弱条和以前在SDSS成像中不可见的潮汐特征。为了最好地利用DECaLS图像的更大深度,志愿者从一组新的答案中选择,这些答案旨在提高我们对合并和酒吧的敏感性。银河动物园志愿者提供了超过314,000个星系的750万个分类。140,000个星系至少有30个分类,足以精确测量像条形图这样的详细形态,其余的大约有5个。所有分类都用于训练贝叶斯卷积神经网络(一种最先进的深度学习方法),以预测所有314,000个星系的详细形态的后验。当与自信的志愿者分类进行衡量时,网络对每个问题的准确率约为99%。形态学是每个星系的基本特征;我们的人类和机器分类是了解星系如何演化的准确而详细的资源。

英文摘要:

We present Galaxy Zoo DECaLS: detailed visual morphological classifications for Dark Energy Camera Legacy Survey images of galaxies within the SDSS DR8 footprint. Deeper DECaLS images (r=23.6 vs. r=22.2 from SDSS) reveal spiral arms, weak bars, and tidal features not previously visible in SDSS imaging. To best exploit the greater depth of DECaLS images, volunteers select from a new set of answers designed to improve our sensitivity to mergers and bars. Galaxy Zoo volunteers provide 7.5 million individual classifications over 314,000 galaxies. 140,000 galaxies receive at least 30 classifications, sufficient to accurately measure detailed morphology like bars, and the remainder receive approximately 5. All classifications are used to train an ensemble of Bayesian convolutional neural networks (a state-of-the-art deep learning method) to predict posteriors for the detailed morphology of all 314,000 galaxies. When measured against confident volunteer classifications, the networks are approximately 99% accurate on every question. Morphology is a fundamental feature of every galaxy; our human and machine classifications are an accurate and detailed resource for understanding how galaxies evolve.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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