Systematics in lensing reconstruction: dark matter rings in the sky?

12 páginas, 8 figuras.-- El Pdf del artículo es la versión pre-print: arXiv:1110.3979v1

Detalles Bibliográficos
Autores: Ponente, P. P., Diego, José María
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/46747
Acceso en línea:http://hdl.handle.net/10261/46747
Access Level:acceso abierto
Palabra clave:Cosmology: observations
Gravitational lensing: weak
Galaxies: clusters: general
Dark matter
Gravitational lensing: strong
id ES_dcbf0ff9fbb18cb15ae491fab2dc80e3
oai_identifier_str oai:digital.csic.es:10261/46747
network_acronym_str ES
network_name_str España
repository_id_str
spelling Systematics in lensing reconstruction: dark matter rings in the sky?Ponente, P. P.Diego, José MaríaCosmology: observationsGravitational lensing: weakGalaxies: clusters: generalDark matterGravitational lensing: strong12 páginas, 8 figuras.-- El Pdf del artículo es la versión pre-print: arXiv:1110.3979v1[Context]: Non-parametric lensing methods are a useful way of reconstructing the lensing mass of a cluster without making assumptions about the way the mass is distributed in the cluster. These methods are particularly powerful in the case of galaxy clusters with a large number of constraints. The advantage of not assuming implicitly that the luminous matter follows the dark matter is particularly interesting in those cases where the cluster is in a non-relaxed dynamical state. On the other hand, non-parametric methods have several limitations that should be taken into account carefully. [Aims]: We explore some of these limitations and focus on their implications for the possible ring of dark matter around the galaxy cluster CL0024+17. [Methods]: We project three background galaxies through a mock cluster of known radial profile density and obtain a map for the arcs (θ map). We also calculate the shear field associated with the mock cluster across the whole field of view (3.3 arcmin). Combining the positions of the arcs and the two-direction shear, we perform an inversion of the lens equation using two separate methods, the biconjugate gradient, and the quadratic programming (QADP) to reconstruct the convergence map of the mock cluster. [Results]: We explore the space of the solutions of the convergence map and compare the radial density profiles to the density profile of the mock cluster. When the inversion matrix algorithms are forced to find the exact solution, we encounter systematic effects resembling ring structures, that clearly depart from the original convergence map. [Conclusions]: Overfitting lensing data with a non-parametric method can produce ring-like structures similar to the alleged one in CL0024.We acknowledge partial financial support from the Ministerio de Ciencia e Innovación project AYA2007-68058-C03-02. PPP acknowledges support from the Spanish Ministerio de Educación y Ciencia and CSIC for an I3P grant.Peer reviewedEDP Sciences201220122011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/46747reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1051/0004-6361/201117382info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/467472026-05-22T06:33:51Z
dc.title.none.fl_str_mv Systematics in lensing reconstruction: dark matter rings in the sky?
title Systematics in lensing reconstruction: dark matter rings in the sky?
spellingShingle Systematics in lensing reconstruction: dark matter rings in the sky?
Ponente, P. P.
Cosmology: observations
Gravitational lensing: weak
Galaxies: clusters: general
Dark matter
Gravitational lensing: strong
title_short Systematics in lensing reconstruction: dark matter rings in the sky?
title_full Systematics in lensing reconstruction: dark matter rings in the sky?
title_fullStr Systematics in lensing reconstruction: dark matter rings in the sky?
title_full_unstemmed Systematics in lensing reconstruction: dark matter rings in the sky?
title_sort Systematics in lensing reconstruction: dark matter rings in the sky?
dc.creator.none.fl_str_mv Ponente, P. P.
Diego, José María
author Ponente, P. P.
author_facet Ponente, P. P.
Diego, José María
author_role author
author2 Diego, José María
author2_role author
dc.subject.none.fl_str_mv Cosmology: observations
Gravitational lensing: weak
Galaxies: clusters: general
Dark matter
Gravitational lensing: strong
topic Cosmology: observations
Gravitational lensing: weak
Galaxies: clusters: general
Dark matter
Gravitational lensing: strong
description 12 páginas, 8 figuras.-- El Pdf del artículo es la versión pre-print: arXiv:1110.3979v1
publishDate 2011
dc.date.none.fl_str_mv 2011
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/46747
url http://hdl.handle.net/10261/46747
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1051/0004-6361/201117382
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869421797074534400
score 15,81155

Similares en LA Referencia