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dc.contributor.author
Boero, Ezequiel Fernando  
dc.contributor.author
Moreschi, Osvaldo Mario  
dc.date.available
2019-12-06T17:51:51Z  
dc.date.issued
2018-04-15  
dc.identifier.citation
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  
dc.identifier.issn
1365-2966  
dc.identifier.uri
http://hdl.handle.net/11336/91654  
dc.description.abstract
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).  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Oxford University Press  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
COSMOLOGY: OBSERVATIONS  
dc.subject
GRAVITATION  
dc.subject
GRAVITATIONAL LENSING: WEAK  
dc.subject.classification
Astronomía  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Gravitational lens optical scalars in terms of energy-momentum distributions in the cosmological framework  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-10-22T16:43:56Z  
dc.identifier.eissn
0035-8711  
dc.journal.volume
475  
dc.journal.number
4  
dc.journal.pagination
4683-4703  
dc.journal.pais
Reino Unido  
dc.journal.ciudad
Londres  
dc.description.fil
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  
dc.description.fil
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  
dc.journal.title
Monthly Notices of the Royal Astronomical Society  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/475/4/4683/4810557?redirectedFrom=fulltext  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1610.06032  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1093/mnras/sty110