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1
Intro
2
the ACDM view of the Universe
3
the Large Synoptic Survey Telescope
4
what does it look like?
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the challenge for modern surveys
6
example of application: gravitational time delays
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automated lens searches: Ring Finder (Gavazzi et al. 2014)
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Conventional Convolutional Neural Network
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Bottleneck residual units
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Pre-activation ResNet
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I performance on simulations
12
Euclid strong lens finding challenge
13
impact of galaxy morphology
14
Auto-Encoding Variational Bayes (Kingma & Welling 2014)
15
recognition model and variational lower bound
16
the reparameterization trick
17
Conditional Variational AutoEncoder (CVAE)
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testing the conditional generation
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morphological statistics
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take away message
21
intrinsic alignment of galaxies
22
hydrodynamical simulations
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inpainting intrinsic aligments on Nbody simulations
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spectral theory on graphs
25
spectral graph convolutions
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Graph Convolutional Networks (Kipf & Welling 2017)
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results on the galaxy inpainting problem
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conclusion
Description:
Explore the cutting-edge applications of Deep Learning in modern Cosmology through this illuminating talk by Dr. Francois Lanusse at the Alan Turing Institute. Delve into the challenges of understanding dark matter and dark energy, which comprise 95% of the Universe, and discover how new cosmological surveys are mapping the cosmos on an unprecedented scale. Learn about innovative Deep Learning techniques addressing critical issues in cosmological data analysis, from automated detection of rare astronomical objects like strong gravitational lenses using deep residual networks to the creation of realistic galaxy images with deep generative models. Gain insights into the use of graph convolutional networks for modeling galaxy properties along the cosmic web in large-scale simulations. Covering topics such as the Large Synoptic Survey Telescope, Conditional Variational AutoEncoders, and spectral graph convolutions, this comprehensive presentation offers a fascinating glimpse into the intersection of artificial intelligence and astrophysics, showcasing how these advanced technologies are revolutionizing our understanding of the Universe. Read more

Exploring the Cosmos with Deep Learning

Alan Turing Institute
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