Cited by 91Galaxies: Formation, Evolution, PhenomenaDomain Adaptation and Few-Shot LearningAdvanced Neural Network Applications

Transfer learning for galaxy morphology from one survey to another

Open access
Domínguez Sánchez, H, Huertas-Company, M, Bernardi, M, Kaviraj, S, Fischer, J L, Abbott, T M C, Abdalla, F B, Annis, J +51 more·2019·Monthly Notices of the Royal Astronomical Society

Abstract

Deep learning (DL) algorithms for morphological classification of galaxies have proven very successful, mimicking (or even improving) visual classifications. However, these algorithms rely on large training samples of labelled galaxies (typically thousands of them). A key question for using DL classifications in future Big Data surveys is how much of the knowledge acquired from an existing survey can be exported to a new data set, i.e. if the features learned by the machines are meaningful for different data. We test the performance of DL models, trained with Sloan Digital Sky Survey (SDSS) data, on Dark Energy Survey (DES) using images for a sample of ∼5000 galaxies with a similar redshift distribution to SDSS. Applying the models directly to DES data provides a reasonable global accuracy (∼90 per cent), but small completeness and purity values. A fast domain adaptation step, consisting of a further training with a small DES sample of galaxies (∼500–300), is enough for obtaining an accuracy >95 per cent and a significant improvement in the completeness and purity values. This demonstrates that, once trained with a particular data set, machines can quickly adapt to new instrument characteristics (e.g. PSF, seeing, depth), reducing by almost one order of magnitude the necessary training sample for morphological classification. Redshift evolution effects or significant depth differences are not taken into account in this study.

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Authors
Domínguez Sánchez, H., Huertas-Company, M., Bernardi, M., Kaviraj, S., Fischer, J. L., Abbott, T. M. C., Abdalla, F. B., Annis, J., Avila, S., Brooks, D., Buckley-Geer, E., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Cunha, C. E., D’Andrea, C. B., da Costa, L. N., Davis, C., De Vicente, J., Doel, P., Evrard, A. E., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Kuehn, K., Kuropatkin, N., Lahav, O., Maia, M. A. G., March, M., Melchior, P., Menanteau, F., Miquel, R., Nord, B., Plazas, A. A., Sanchez, E., Scarpine, V, Schindler, R., Schubnell, M., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Walker, A. R., & Zuntz, J.
Affiliations
  • Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
  • Centre National de la Recherche Scientifique (FR)
  • University of Hertfordshire (GB)
  • Cerro Tololo Inter-American Observatory (CL)
  • Rhodes University (ZA)
  • Fermi National Accelerator Laboratory (US)
  • University College London (GB)
  • Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA
  • Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400, Brazil
  • Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA
  • University of Illinois Urbana-Champaign (US)
  • Institute for High Energy Physics (ES)
  • Kavli Institute for Particle Astrophysics and Cosmology (US)
  • Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
  • Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES)
  • University of Michigan (US)
  • Institute of Space Sciences (ES)
  • Institut dÉstudis Espacials de Catalunya (IEEC), E-08193 Barcelona, Spain
  • University of California, Santa Cruz (US)
  • Max Planck Institute for Extraterrestrial Physics (DE)
  • Australian Astronomical Observatory (AU)
  • National Observatory (BR)
  • Princeton University (US)
  • Institució Catalana de Recerca i Estudis Avançats (ES)
  • Jet Propulsion Laboratory (US)
  • Universidade Estadual de Campinas (UNICAMP) (BR)
  • Oak Ridge National Laboratory (US)
  • Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
Venue
Monthly Notices of the Royal Astronomical Society
Published
2018-12-28
Volume
484
Issue
1
Pages
93-100
ISSN
  • 0035-8711 (ISSN-L)
  • 1365-2966
OpenAlex
W2907489335
Cited by
91
References
37
Citations by year
2026: 7 · 2025: 11 · 2024: 6 · 2023: 14 · 2022: 11 · 2021: 17 · 2020: 10 · 2019: 14 · 2018: 1
FWCI
5.65
Type
journal article
Language
en
Open access
Locations
  • Monthly Notices of the Royal Astronomical Society (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, other-oa)
  • University of Hertfordshire Research Archive (University of Hertfordshire) (submittedVersion)
  • HAL (submittedVersion, other-oa)
  • Americanae (AECID Library) (submittedVersion, other-oa)
  • UCL Discovery (University College London) (submittedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, other-oa)
  • arXiv (Cornell University)
  • ETH Zürich Research Collection
Funders
  • National Research Council (AST-1816330, AST-1138766, AST-1536171)
  • U.S. Department of Energy
  • Ministerio de Ciencia e Innovación
  • Ministerio de Economía y Competitividad (AYA2015-71825, ESP2015-66861, FPA2015-68048, SEV-2016-0588, SEV-2016-0597, MDM-2015-0509)
  • Science and Technology Facilities Council
  • Higher Education Funding Council for England
  • North Carolina Stroke Association
  • University of Cambridge
  • University of Chicago
  • University College London
  • University of Illinois
  • University of Michigan
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Computer Science › Artificial Intelligence › Domain Adaptation and Few-Shot Learning
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Neural Network Applications
Keywords
galaxy morphology, morphological classification, transfer learning, domain adaptation, deep learning, Sloan Digital Sky Survey, Dark Energy Survey, training sample size

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