Forging new worlds: high-resolution synthetic galaxies with chained generative adversarial networks

11/07/2018 ∙ by Levi Fussell, et al. ∙ 6

Astronomy of the 21st century finds itself with extreme quantities of data, with most of it filtered out during capture to save on memory storage. This growth is ripe for modern technologies such as deep learning, as deep image processing techniques have the potential to allow astronomers to automatically identify, classify, segment and deblend various astronomical objects, and to aid in the calibration of shape measurements for weak lensing in cosmology through large datasets augmented with synthetic images. Since galaxies are a prime contender for such applications, we explore the use of generative adversarial networks (GANs), a class of generative models, to produce physically realistic galaxy images. By measuring the distributions of multiple physical properties, we show that images generated with our approach closely follow the distributions of real galaxies, further establishing state-of-the-art GAN architectures as a valuable tool for modern-day astronomy.



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