Mining Hubble Space Telescope images

We present a unsupervised machine learning technique to explore large sky surveys produced by imaging telescopes. Distinct from previous approaches this technique requires no pre-selection of target galaxy type; instead it automatically identifies objects that are similar. We apply the technique to the five Hubble Space Telescope CANDELS fields and compare the machine-based classifications to human-classifications from the Galaxy Zoo: CANDELS project. We find that although there is not a direct mapping between Galaxy Zoo and our hierarchical labelling, there is a good level of concordance between human and machine classifications. A catalogue and galaxy similarity search is provided for the CANDELS fields at

Date: 24/03/2017
Time: 16:00
Location: LB252

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