English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/110110
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Searching for a dipole modulation in the large-scale structure of the Universe

AuthorsFernández-Cobos, R. ; Vielva, P. ; Pietrobon, D.; Balbi, A.; Martínez-González, Enrique ; Barreiro, R. Belén
Issue Date2014
PublisherOxford University Press
Royal Astronomical Society
CitationMonthly Notices of the Royal Astronomical Society 441(3): 2392-2397 (2014)
AbstractSeveral statistical anomalies in the cosmic microwave background (CMB) temperature anisotropies seem to defy the assumption of a homogeneous and isotropic universe. In particular, a dipole modulation has been detected both in WMAP and Planck data. We adapt the methodology proposed by Eriksen et al. on CMBdata to galaxy surveys, tracing the large-scale structure. We analyse the National Radio Astronomy Observatory (NRAO) and Very Large Array (VLA) Sky Survey data at a resolution of ~2° for three different flux thresholds: 2.5, 5.0 and 10.0 mJy, respectively. No evidence of a dipole modulation is found. This result suggests that the origin of the dipole asymmetry found in the CMB cannot be assigned to secondary anisotropies produced at redshifts around z=1. However, it could still have been generated at redshifts higher or lower, such as the integrated Sachs-Wolfe effect produced by the local structures. Other all-sky surveys, like the infrared WISE catalogue, could help to explore with a high sensitivity a redshift interval closer than the one probed with NVSS. © 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
Publisher version (URL)http://dx.doi.org/10.1093/mnras/stu749
URIhttp://hdl.handle.net/10261/110110
DOI10.1093/mnras/stu749
Identifiersdoi: 10.1093/mnras/stu749
e-issn: 1365-2966
issn: 0035-8711
Appears in Collections:(IFCA) Artículos
Files in This Item:
File Description SizeFormat 
Searching for a dipole modulation.pdf888,06 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.