PS J2107-1611: A new wide-separation, quadruply imaged lensed quasar with flux ratio anomalies

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dc.contributor.authorDux, Frédéric
dc.contributor.authorLemon, Cameron
dc.contributor.authorCourbin, Frédéric
dc.contributor.authorSluse, Dominique
dc.contributor.authorSmette, Alain
dc.contributor.authorAnguita, Timo
dc.contributor.authorNeira, Favio
dc.date.accessioned2025-01-27T19:01:46Z
dc.date.available2025-01-27T19:01:46Z
dc.date.issued2023-11
dc.descriptionIndexación: Scopus
dc.description.abstractWe report the discovery of PS J2107-1611, a fold-configuration 4.3′′-separation quadruply lensed quasar with a bright lensed arc. It was discovered using a convolutional neural network on Pan-STARRS gri images of pre-selected quasar candidates with multiple nearby Pan-STARRS detections. Spectroscopic follow-up with EFOSC2 on the ESO 3.58 m New Technology Telescope reveals the source to be a quasar at z = 2.673, with the blended fold image pair showing deformed broad lines relative to the other images. The flux ratios measured from optical to near-infrared imaging in the Canada-France-Hawaii Telescope Legacy Survey, Pan-STARRS, the Legacy Surveys, and the Vista Hemisphere Survey are inconsistent with a smooth mass model as the fold pair images are ∼15 times too faint. Variability, time delay effects, and reddening are ruled out through multiple-epoch imaging and color information. The system is marginally resolved in the radio in the Very Large Array Sky Survey S-band, where it has a 10 mJy detection. The radio flux ratios are compatible with the smooth mass macromodel. This system offers a unique tool for future studies of quasar structure with strong and microlensing. A more detailed analysis of follow-up with JWST/MIRI, VLT/MUSE, VLT/ERIS, and data from the European Very Long Baseline Interferometer will be presented in a forthcoming paper. © 2023 EDP Sciences. All rights reserved.
dc.description.urihttps://www.aanda.org/articles/aa/full_html/2023/11/aa48227-23/aa48227-23.html
dc.identifier.citationAstronomy and Astrophysics. Volume 679. 1 November 2023. Article number L4
dc.identifier.doi10.1051/0004-6361/202348227
dc.identifier.issn0004-6361
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/63307
dc.language.isoen
dc.publisherEDP Sciences
dc.rights.licenseAttribution 4.0 International Deed (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectGalaxies: Active
dc.subjectGravitational lensing: strong
dc.titlePS J2107-1611: A new wide-separation, quadruply imaged lensed quasar with flux ratio anomalies
dc.typeArtículo
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