Enhanced pixelated modeling of group and cluster scale lenses: Getting ready for Vera Rubin

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dc.catalogadorgjm
dc.contributor.advisorBarrientos, Luis Felipe
dc.contributor.advisorJullo, Eric
dc.contributor.authorUrcelay Solís de Ovando, Felipe José
dc.contributor.otherPontificia Universidad Católica de Chile. Instituto de Astrofísica
dc.date.accessioned2025-05-29T16:46:40Z
dc.date.available2025-05-29T16:46:40Z
dc.date.issued2025
dc.date.updated2025-05-22T23:51:12Z
dc.descriptionTesis (Master’s degree in Astrophysics)--Pontificia Universidad Católica de Chile, 2025.
dc.description.abstractUpcoming wide-field surveys like LSST and Euclid will uncover thousands of strong gravitational lenses, enabling statistical studies of lens properties, tracing mass distributions from galaxies to clusters, and probing cosmology. While automated modeling exists for galaxy-scale lenses, group- and cluster-scale systems remain challenging due to their complexity.We present a fast, automated method for modeling group and cluster strong lenses, optimized for LSST-like data. The approach combines a large-scale halo with subhalos defined by scaling relations and uses a third-order Taylor expansion for subhalo deflections to improve computational efficiency. The method is memory-light and scales independently of cluster richness.We validate the pipeline on 200 LSST-like simulated lenses (100 clusters, 100 groups), recovering unbiased halo parameters and accurate total masses. Performance improves when selecting lenses with bright arcs or radial features. Application to real SGAS systems yields results consistent with previous models.We discuss possible applications of this method, such as constraining the halo mass function, inner slope of clusters, and subhalo properties. We also outline the necessary extensions for modeling Euclid lenses, which require increased source complexity due to the higher resolution.
dc.fechaingreso.objetodigital2025-05-29
dc.format.extent92 páginas
dc.fuente.origenAutoarchivo
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/104520
dc.information.autorucInstituto de Astrofísica; Barrientos, Luis Felipe; 0000-0003-0151-0718; 102167
dc.information.autorucInstituto de Astrofísica; Urcelay Solís de Ovando, Felipe José; S/I; 247050
dc.language.isoen
dc.nota.accesocontenido completo
dc.rightsacceso abierto
dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject.ddc520
dc.subject.deweyAstronomíaes_ES
dc.titleEnhanced pixelated modeling of group and cluster scale lenses: Getting ready for Vera Rubin
dc.typetesis de maestría
sipa.codpersvinculados102167
sipa.codpersvinculados247050
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