English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/46375
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Campo DC Valor Lengua/Idioma
dc.contributor.authorCurto, Andrés-
dc.contributor.authorMartínez-González, Enrique-
dc.contributor.authorBarreiro, R. Belén-
dc.date.accessioned2012-02-29T11:28:39Z-
dc.date.available2012-02-29T11:28:39Z-
dc.date.issued2011-04-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society 412(2): 1038-1046 (2011)es_ES
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10261/46375-
dc.description9 páginas, 9 figuras, 1 tabla.-- El Pdf del artículo es la versión pre-print: arXiv:1007.2181v2es_ES
dc.description.abstractWe study the spherical Mexican hat wavelet as a detector of primordial non-Gaussianity of the local type on the cosmic microwave background (CMB) anisotropies. For this purpose, we define third-order statistics based on the wavelet coefficient maps and the original map. We find the dependence of these statistics in terms of the non-linear coupling parameter fnl and the bispectrum of this type of non-Gaussianity. We compare the analytical values for these statistics with the results obtained with non-Gaussian simulations for an ideal full-sky CMB experiment without noise. We study the power of this method to detect fnl, that is, the variance of this parameter σ2(fnl), and compare it with the variance obtained from the primary bispectrum for the same experiment. Finally, we apply our wavelet-based estimator on Wilkinson Microwave Anisotropy Probe like maps with incomplete sky and inhomogeneous noise, and compare with the optimal bispectrum estimator. The results show that the wavelet cubic statistics are as efficient as the bispectrum as optimal detectors of this type of primordial non-Gaussianity.es_ES
dc.description.sponsorshipWe acknowledge partial financial support from the Spanish Ministerio de Ciencia e Innovación project AYA2007-68058-C03-02. AC thanks the Spanish Ministerio de Ciencia e Innovación for a pre-doctoral fellowship and the Universidad de Cantabria for a post-doctoral fellowship.es_ES
dc.language.isoenges_ES
dc.publisherWiley-Blackwelles_ES
dc.rightsopenAccesses_ES
dc.subjectMethods: data analysises_ES
dc.subjectCosmic background radiationes_ES
dc.subjectCosmology: observationses_ES
dc.titleOn the optimality of the spherical Mexican hat wavelet estimator for the primordial non-Gaussianityes_ES
dc.typeArtículoes_ES
dc.identifier.doi10.1111/j.1365-2966.2010.17961.x-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1111/j.1365-2966.2010.17961.xes_ES
dc.identifier.e-issn1365-2966-
Aparece en las colecciones: (IFCA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
1007.2181v2.pdf1,18 MBAdobe PDFVista previa
Visualizar/Abrir
Show simple item record
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.