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• W4312186721 startingPage "26" @default.
• W4312186721 abstract "Strong lensing in galaxy clusters probes properties of dense cores of dark matter halos in mass, studies the distant universe at flux levels and spatial resolutions otherwise unavailable, and constrains cosmological models independently. The next-generation large scale sky imaging surveys are expected to discover thousands of cluster-scale strong lenses, which would lead to unprecedented opportunities for applying cluster-scale strong lenses to solve astrophysical and cosmological problems. However, the large dataset challenges astronomers to identify and extract strong lensing signals, particularly strongly lensed arcs, because of their complexity and variety. Hence, we propose a framework to detect cluster-scale strongly lensed arcs, which contains a transformer-based detection algorithm and an image simulation algorithm. We embed prior information of strongly lensed arcs at cluster-scale into the training data through simulation and then train the detection algorithm with simulated images. We use the trained transformer to detect strongly lensed arcs from simulated and real data. Results show that our approach could achieve 99.63 % accuracy rate, 90.32 % recall rate, 85.37 % precision rate and 0.23 % false positive rate in detection of strongly lensed arcs from simulated images and could detect almost all strongly lensed arcs in real observation images. Besides, with an interpretation method, we have shown that our method could identify important information embedded in simulated data. Next step, to test the reliability and usability of our approach, we will apply it to available observations (e.g., DESI Legacy Imaging Surveys) and simulated data of upcoming large-scale sky surveys, such as the Euclid and the CSST." @default.
• W4312186721 created "2023-01-04" @default.
• W4312186721 creator A5007024868 @default.
• W4312186721 creator A5015105154 @default.
• W4312186721 creator A5035317876 @default.
• W4312186721 creator A5048711973 @default.
• W4312186721 creator A5054220107 @default.
• W4312186721 creator A5062451009 @default.
• W4312186721 creator A5087195720 @default.
• W4312186721 date "2022-12-22" @default.
• W4312186721 modified "2023-09-26" @default.
• W4312186721 title "Detection of Strongly Lensed Arcs in Galaxy Clusters with Transformers" @default.
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