Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework

Autores
Boero, Ezequiel Fernando; Moreschi, Osvaldo Mario
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present new results on gravitational lensing over cosmological Robertson-Walker backgrounds which extend and generalize previous works. Our expressions show the presence of new terms and factors which have been neglected in the literature on the subject. The new equations derived here for the optical scalars allow to deal with more general matter content including sources with non-Newtonian components of the energy-momentum tensor and arbitrary motion. Our treatment is within the framework of weak gravitational lenses in which first-order effects of the curvature are considered. We have been able to make all calculations without referring to the concept of deviation angle. This in turn, makes the presentation shorter but also allows for the consideration of global effects on the Robertson-Walker background that have been neglected in the literature. We also discuss two intensity magnifications that we define in this article; one coming from a natural geometrical construction in terms of the affine distance, that we here call μ and the other adapted to cosmological discussions in terms of the redshift, that we call μ We show that the natural intensity magnification μ coincides with the standard angular magnification (μ).
Fil: Boero, Ezequiel Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Moreschi, Osvaldo Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Materia
COSMOLOGY: OBSERVATIONS
GRAVITATION
GRAVITATIONAL LENSING: WEAK
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/91654
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological frameworkBoero, Ezequiel FernandoMoreschi, Osvaldo MarioCOSMOLOGY: OBSERVATIONSGRAVITATIONGRAVITATIONAL LENSING: WEAKhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present new results on gravitational lensing over cosmological Robertson-Walker backgrounds which extend and generalize previous works. Our expressions show the presence of new terms and factors which have been neglected in the literature on the subject. The new equations derived here for the optical scalars allow to deal with more general matter content including sources with non-Newtonian components of the energy-momentum tensor and arbitrary motion. Our treatment is within the framework of weak gravitational lenses in which first-order effects of the curvature are considered. We have been able to make all calculations without referring to the concept of deviation angle. This in turn, makes the presentation shorter but also allows for the consideration of global effects on the Robertson-Walker background that have been neglected in the literature. We also discuss two intensity magnifications that we define in this article; one coming from a natural geometrical construction in terms of the affine distance, that we here call μ and the other adapted to cosmological discussions in terms of the redshift, that we call μ We show that the natural intensity magnification μ coincides with the standard angular magnification (μ).Fil: Boero, Ezequiel Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Moreschi, Osvaldo Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; ArgentinaOxford University Press2018-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/91654Boero, Ezequiel Fernando; Moreschi, Osvaldo Mario; Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 475; 4; 15-4-2018; 4683-47031365-29660035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/475/4/4683/4810557?redirectedFrom=fulltextinfo:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1610.06032info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty110info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:46:59Zoai:ri.conicet.gov.ar:11336/91654instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:46:59.463CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework
title Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework
spellingShingle Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework
Boero, Ezequiel Fernando
COSMOLOGY: OBSERVATIONS
GRAVITATION
GRAVITATIONAL LENSING: WEAK
title_short Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework
title_full Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework
title_fullStr Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework
title_full_unstemmed Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework
title_sort Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework
dc.creator.none.fl_str_mv Boero, Ezequiel Fernando
Moreschi, Osvaldo Mario
author Boero, Ezequiel Fernando
author_facet Boero, Ezequiel Fernando
Moreschi, Osvaldo Mario
author_role author
author2 Moreschi, Osvaldo Mario
author2_role author
dc.subject.none.fl_str_mv COSMOLOGY: OBSERVATIONS
GRAVITATION
GRAVITATIONAL LENSING: WEAK
topic COSMOLOGY: OBSERVATIONS
GRAVITATION
GRAVITATIONAL LENSING: WEAK
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present new results on gravitational lensing over cosmological Robertson-Walker backgrounds which extend and generalize previous works. Our expressions show the presence of new terms and factors which have been neglected in the literature on the subject. The new equations derived here for the optical scalars allow to deal with more general matter content including sources with non-Newtonian components of the energy-momentum tensor and arbitrary motion. Our treatment is within the framework of weak gravitational lenses in which first-order effects of the curvature are considered. We have been able to make all calculations without referring to the concept of deviation angle. This in turn, makes the presentation shorter but also allows for the consideration of global effects on the Robertson-Walker background that have been neglected in the literature. We also discuss two intensity magnifications that we define in this article; one coming from a natural geometrical construction in terms of the affine distance, that we here call μ and the other adapted to cosmological discussions in terms of the redshift, that we call μ We show that the natural intensity magnification μ coincides with the standard angular magnification (μ).
Fil: Boero, Ezequiel Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Moreschi, Osvaldo Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
description We present new results on gravitational lensing over cosmological Robertson-Walker backgrounds which extend and generalize previous works. Our expressions show the presence of new terms and factors which have been neglected in the literature on the subject. The new equations derived here for the optical scalars allow to deal with more general matter content including sources with non-Newtonian components of the energy-momentum tensor and arbitrary motion. Our treatment is within the framework of weak gravitational lenses in which first-order effects of the curvature are considered. We have been able to make all calculations without referring to the concept of deviation angle. This in turn, makes the presentation shorter but also allows for the consideration of global effects on the Robertson-Walker background that have been neglected in the literature. We also discuss two intensity magnifications that we define in this article; one coming from a natural geometrical construction in terms of the affine distance, that we here call μ and the other adapted to cosmological discussions in terms of the redshift, that we call μ We show that the natural intensity magnification μ coincides with the standard angular magnification (μ).
publishDate 2018
dc.date.none.fl_str_mv 2018-04-15
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/91654
Boero, Ezequiel Fernando; Moreschi, Osvaldo Mario; Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 475; 4; 15-4-2018; 4683-4703
1365-2966
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/91654
identifier_str_mv Boero, Ezequiel Fernando; Moreschi, Osvaldo Mario; Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 475; 4; 15-4-2018; 4683-4703
1365-2966
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/475/4/4683/4810557?redirectedFrom=fulltext
info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1610.06032
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty110
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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