Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars

Context. Strongly lensed quasars are fundamental sources for cosmology. The Gaia space mission covers the entire sky with the unprecedented resolution of 0.18′′ in the optical, making it an ideal instrument to search for gravitational lenses down to the limiting magnitude of 21. Nevertheless, the pr...

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Autores: Krone Martins, A., Ducourant, C., Gallucio, L., Delchambre, L., Oreshina-Slezak, I., Teixeira, R., Braine, J., Le Campion, J.F., Mignard, F., Torralba Elipe, Guillermo, Et al.
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universidad Europea (UEM)
Repositorio:ABACUS. Repositorio de Producción Científica
Idioma:inglés
OAI Identifier:oai:abacus.universidadeuropea.com:11268/13001
Acceso en línea:http://hdl.handle.net/11268/13001
Access Level:acceso abierto
Palabra clave:Astrofísica
Quasar
Galaxia
Goal 9: Build resilient infrastructure, promote sustainable industrialization and foster innovation
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spelling Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasarsKrone Martins, A.Ducourant, C.Gallucio, L.Delchambre, L.Oreshina-Slezak, I.Teixeira, R.Braine, J.Le Campion, J.F.Mignard, F.Torralba Elipe, GuillermoEt al.AstrofísicaQuasarGalaxiaGoal 9: Build resilient infrastructure, promote sustainable industrialization and foster innovationContext. Strongly lensed quasars are fundamental sources for cosmology. The Gaia space mission covers the entire sky with the unprecedented resolution of 0.18′′ in the optical, making it an ideal instrument to search for gravitational lenses down to the limiting magnitude of 21. Nevertheless, the previous Gaia Data Releases are known to be incomplete for small angular separations such as those expected for most lenses. Aims. We present the Data Processing and Analysis Consortium GravLens pipeline, which was built to analyse all Gaia detections around quasars and to cluster them into sources, thus producing a catalogue of secondary sources around each quasar. We analysed the resulting catalogue to produce scores that indicate source configurations that are compatible with strongly lensed quasars. Methods. GravLens uses the DBSCAN unsupervised clustering algorithm to detect sources around quasars. The resulting catalogue of multiplets is then analysed with several methods to identify potential gravitational lenses. We developed and applied an outlier scoring method, a comparison between the average BP and RP spectra of the components, and we also used an extremely randomised tree algorithm. These methods produce scores to identify the most probable configurations and to establish a list of lens candidates. Results. We analysed the environment of 3 760 032 quasars. A total of 4 760 920 sources, including the quasars, were found within 6′′ of the quasar positions. This list is given in the Gaia archive. In 87% of cases, the quasar remains a single source, and in 501 385 cases neighbouring sources were detected. We propose a list of 381 lensed candidates, of which we identified 49 as the most promising ones. Beyond these candidates, the associate tables in this Focused Product Release allow the entire community to explore the unique Gaia data for strong lensing studies further.20242024-08-2220242024-01-0120242024-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/11268/13001reponame:ABACUS. Repositorio de Producción Científicainstname:Universidad Europea (UEM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttps://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:abacus.universidadeuropea.com:11268/130012026-06-11T12:41:27Z
dc.title.none.fl_str_mv Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
title Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
spellingShingle Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
Krone Martins, A.
Astrofísica
Quasar
Galaxia
Goal 9: Build resilient infrastructure, promote sustainable industrialization and foster innovation
title_short Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
title_full Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
title_fullStr Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
title_full_unstemmed Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
title_sort Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
dc.creator.none.fl_str_mv Krone Martins, A.
Ducourant, C.
Gallucio, L.
Delchambre, L.
Oreshina-Slezak, I.
Teixeira, R.
Braine, J.
Le Campion, J.F.
Mignard, F.
Torralba Elipe, Guillermo
Et al.
author Krone Martins, A.
author_facet Krone Martins, A.
Ducourant, C.
Gallucio, L.
Delchambre, L.
Oreshina-Slezak, I.
Teixeira, R.
Braine, J.
Le Campion, J.F.
Mignard, F.
Torralba Elipe, Guillermo
Et al.
author_role author
author2 Ducourant, C.
Gallucio, L.
Delchambre, L.
Oreshina-Slezak, I.
Teixeira, R.
Braine, J.
Le Campion, J.F.
Mignard, F.
Torralba Elipe, Guillermo
Et al.
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Astrofísica
Quasar
Galaxia
Goal 9: Build resilient infrastructure, promote sustainable industrialization and foster innovation
topic Astrofísica
Quasar
Galaxia
Goal 9: Build resilient infrastructure, promote sustainable industrialization and foster innovation
description Context. Strongly lensed quasars are fundamental sources for cosmology. The Gaia space mission covers the entire sky with the unprecedented resolution of 0.18′′ in the optical, making it an ideal instrument to search for gravitational lenses down to the limiting magnitude of 21. Nevertheless, the previous Gaia Data Releases are known to be incomplete for small angular separations such as those expected for most lenses. Aims. We present the Data Processing and Analysis Consortium GravLens pipeline, which was built to analyse all Gaia detections around quasars and to cluster them into sources, thus producing a catalogue of secondary sources around each quasar. We analysed the resulting catalogue to produce scores that indicate source configurations that are compatible with strongly lensed quasars. Methods. GravLens uses the DBSCAN unsupervised clustering algorithm to detect sources around quasars. The resulting catalogue of multiplets is then analysed with several methods to identify potential gravitational lenses. We developed and applied an outlier scoring method, a comparison between the average BP and RP spectra of the components, and we also used an extremely randomised tree algorithm. These methods produce scores to identify the most probable configurations and to establish a list of lens candidates. Results. We analysed the environment of 3 760 032 quasars. A total of 4 760 920 sources, including the quasars, were found within 6′′ of the quasar positions. This list is given in the Gaia archive. In 87% of cases, the quasar remains a single source, and in 501 385 cases neighbouring sources were detected. We propose a list of 381 lensed candidates, of which we identified 49 as the most promising ones. Beyond these candidates, the associate tables in this Focused Product Release allow the entire community to explore the unique Gaia data for strong lensing studies further.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-08-22
2024
2024-01-01
2024
2024-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/11268/13001
url http://hdl.handle.net/11268/13001
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:ABACUS. Repositorio de Producción Científica
instname:Universidad Europea (UEM)
instname_str Universidad Europea (UEM)
reponame_str ABACUS. Repositorio de Producción Científica
collection ABACUS. Repositorio de Producción Científica
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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