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dc.contributor.authorFleury, Pierre Baptiste 
dc.contributor.authorGarcía-Bellido Capdevila, Juan 
dc.contributor.otherUAM. Departamento de Física Teóricaes_ES
dc.date.accessioned2021-07-09T11:36:31Z
dc.date.available2021-07-09T11:36:31Z
dc.date.issued2020-04-24
dc.identifier.citationPhysics of the Dark Universe 29 (2020): 100567en_US
dc.identifier.issn2212-6864 (online)en_US
dc.identifier.urihttp://hdl.handle.net/10486/696431
dc.description.abstractGravitational microlensing is a key probe of the nature of dark matter and its distribution on the smallest scales. For many practical purposes, confronting theory to observation requires to model the probability that a light source is highly amplified by many-lens systems. This article reviews four simple analytic models of the amplification probability distribution, based on different approximations: (i) the strongest-lens model; (ii) the multiplicative model, where the total amplification is assumed to be the product of all the lenses’ individual amplifications; (iii) a hybrid version of the previous two; and (iv) an empirical fitting function. In particular, a new derivation of the multiplicative amplification distribution is proposed, thereby correcting errors in the literature. Finally, the accuracy of these models is tested against ray-shooting simulations. They all produce excellent results as long as lenses are light and rare (low optical depth); however, for larger optical depths, none of them succeeds in capturing the relevant features of the amplification distribution. This conclusion emphasizes the crucial role of lens–lens coupling at large optical depthsen_US
dc.description.sponsorshipPF received the support of a fellowship from ‘‘la Caixa’’ Foundation, Spain (ID 100010434). The fellowship code is LCF/BQ/PI19/11690018. JGB thanks the CERN TH-Division for hospitality during his sabbatical, when this project was initiated, and acknowledges support from the Research Project FPA2015-68048-03-3P [MINECO-FEDER] and the Centro de Excelencia Severo Ochoa Program SEV-2012-0597. He also acknowledges support from the Salvador de Madariaga Program, Ref. PRX17/00056en_US
dc.format.extent19 pag.es_ES
dc.format.mimetypeapplication/pdfes_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relation.ispartofPhysics of the Dark Universeen_US
dc.rights© 2020 Published by Elsevier B.V.en_US
dc.subject.otherGravitational Lensesen_US
dc.subject.otherQuasarsen_US
dc.subject.otherGalaxiesen_US
dc.titleOn simple analytic models of microlensing amplification statisticsen_US
dc.typearticleen_US
dc.subject.ecienciaFísicaes_ES
dc.date.embargoend2022-04-24
dc.relation.publisherversionhttps://doi.org/10.1016/j.dark.2020.100567es_ES
dc.identifier.doi10.1016/j.dark.2020.100567es_ES
dc.identifier.publicationfirstpage100567-1es_ES
dc.identifier.publicationlastpage100567-19es_ES
dc.identifier.publicationvolume29es_ES
dc.relation.projectIDGobierno de España. FPA2015-68048-03-3Pes_ES
dc.relation.projectIDGobierno de España. SEV-2012-0597es_ES
dc.type.versioninfo:eu-repo/semantics/acceptedVersionen
dc.rights.ccReconocimiento – NoComercial – SinObraDerivadaes_ES
dc.rights.accessRightsopenAccesses_ES
dc.authorUAMGarcía-Bellido Capdevila, Juan (259823)
dc.facultadUAMFacultad de Ciencias
dc.institutoUAMInstituto de Física Teórica (IFT)


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