AutoLens: automated modeling of a strong lens’s light, mass and source
This work presents AutoLens, the first entirely automated modeling suite for the analysis of galaxy-scale strong gravitational lenses. AutoLens simultaneously models the lens galaxy’s light and mass whilst reconstructing the extended source galaxy on an adaptive pixel-grid. The method’s approach to...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Oxford University Press
2018
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| Online Access: | https://eprints.nottingham.ac.uk/52389/ |
| _version_ | 1848798715038400512 |
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| author | Nightingale, J.W. Dye, S. Massey, Richard J. |
| author_facet | Nightingale, J.W. Dye, S. Massey, Richard J. |
| author_sort | Nightingale, J.W. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This work presents AutoLens, the first entirely automated modeling suite for the analysis of galaxy-scale strong gravitational lenses. AutoLens simultaneously models the lens galaxy’s light and mass whilst reconstructing the extended source galaxy on an adaptive pixel-grid. The method’s approach to source-plane discretization is amorphous, adapting its clustering and regularization to the intrinsic properties of the lensed source. The lens’s light is fitted using a superposition of Sersic functions, allowing AutoLens to cleanly deblend its light from the source. Single component mass models representing the lens’s total mass density profile are demonstrated, which in conjunction with light modeling can detect central images using a centrally cored profile. Decomposed mass modeling is also shown, which can fully decouple a lens’s light and dark matter and determine whether the two component are geometrically aligned. The complexity of the light and mass models are automatically chosen via Bayesian model comparison. These steps form AutoLens’s automated analysis pipeline, such that all results in this work are generated without any user-intervention. This is rigorously tested on a large suite of simulated images, assessing its performance on a broad range of lens profiles, source morphologies and lensing geometries. The method’s performance is excellent, with accurate light, mass and source profiles inferred for data sets representative of both existing Hubble imaging and future Euclid wide-field observations. |
| first_indexed | 2025-11-14T20:24:10Z |
| format | Article |
| id | nottingham-52389 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T20:24:10Z |
| publishDate | 2018 |
| publisher | Oxford University Press |
| recordtype | eprints |
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| spelling | nottingham-523892018-06-14T16:31:20Z https://eprints.nottingham.ac.uk/52389/ AutoLens: automated modeling of a strong lens’s light, mass and source Nightingale, J.W. Dye, S. Massey, Richard J. This work presents AutoLens, the first entirely automated modeling suite for the analysis of galaxy-scale strong gravitational lenses. AutoLens simultaneously models the lens galaxy’s light and mass whilst reconstructing the extended source galaxy on an adaptive pixel-grid. The method’s approach to source-plane discretization is amorphous, adapting its clustering and regularization to the intrinsic properties of the lensed source. The lens’s light is fitted using a superposition of Sersic functions, allowing AutoLens to cleanly deblend its light from the source. Single component mass models representing the lens’s total mass density profile are demonstrated, which in conjunction with light modeling can detect central images using a centrally cored profile. Decomposed mass modeling is also shown, which can fully decouple a lens’s light and dark matter and determine whether the two component are geometrically aligned. The complexity of the light and mass models are automatically chosen via Bayesian model comparison. These steps form AutoLens’s automated analysis pipeline, such that all results in this work are generated without any user-intervention. This is rigorously tested on a large suite of simulated images, assessing its performance on a broad range of lens profiles, source morphologies and lensing geometries. The method’s performance is excellent, with accurate light, mass and source profiles inferred for data sets representative of both existing Hubble imaging and future Euclid wide-field observations. Oxford University Press 2018-05-22 Article PeerReviewed application/pdf en https://eprints.nottingham.ac.uk/52389/1/sty1264.pdf Nightingale, J.W., Dye, S. and Massey, Richard J. (2018) AutoLens: automated modeling of a strong lens’s light, mass and source. Monthly Notices of the Royal Astronomical Society . ISSN 0035-8711 gravitational lensing galaxies: structure https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/sty1264/5001434 doi:10.1093/mnras/sty1264 doi:10.1093/mnras/sty1264 |
| spellingShingle | gravitational lensing galaxies: structure Nightingale, J.W. Dye, S. Massey, Richard J. AutoLens: automated modeling of a strong lens’s light, mass and source |
| title | AutoLens: automated modeling of a strong lens’s light, mass and source |
| title_full | AutoLens: automated modeling of a strong lens’s light, mass and source |
| title_fullStr | AutoLens: automated modeling of a strong lens’s light, mass and source |
| title_full_unstemmed | AutoLens: automated modeling of a strong lens’s light, mass and source |
| title_short | AutoLens: automated modeling of a strong lens’s light, mass and source |
| title_sort | autolens: automated modeling of a strong lens’s light, mass and source |
| topic | gravitational lensing galaxies: structure |
| url | https://eprints.nottingham.ac.uk/52389/ https://eprints.nottingham.ac.uk/52389/ https://eprints.nottingham.ac.uk/52389/ |