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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
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