English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/140026
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Joint analysis of BICEP2/Keck Array and Planck data

AutorAde, P. A. R.; Barreiro, R. Belén ; Bonavera, Laura ; Curto, Andrés ; Diego, José María ; González-Nuevo, J. ; Herranz, D. ; López-Caniego, M. ; Martínez-González, Enrique ; Toffolatti, L. ; Vielva, P. ; Rebolo López, Rafael; Planck Collaboration
Fecha de publicación2015
EditorAmerican Physical Society
CitaciónPhysical Review Letters 114(10): 101301 (2015)
ResumenWe report the results of a joint analysis of data from BICEP2/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400 deg2 patch of sky centered on RA 0 h, Dec. -57.5. The combined maps reach a depth of 57 nK deg in Stokes Q and U in a band centered at 150 GHz. Planck has observed the full sky in polarization at seven frequencies from 30 to 353 GHz, but much less deeply in any given region (1.2 μK deg in Q and U at 143 GHz). We detect 150×353 cross-correlation in B modes at high significance. We fit the single- and cross-frequency power spectra at frequencies ≥150 GHz to a lensed-ΛCDM model that includes dust and a possible contribution from inflationary gravitational waves (as parametrized by the tensor-to-scalar ratio r), using a prior on the frequency spectral behavior of polarized dust emission from previous Planck analysis of other regions of the sky. We find strong evidence for dust and no statistically significant evidence for tensor modes. We probe various model variations and extensions, including adding a synchrotron component in combination with lower frequency data, and find that these make little difference to the r constraint. Finally, we present an alternative analysis which is similar to a map-based cleaning of the dust contribution, and show that this gives similar constraints. The final result is expressed as a likelihood curve for r, and yields an upper limit r0.05<0.12 at 95% confidence. Marginalizing over dust and r, lensing B modes are detected at 7.0σ significance.
DescripciónUnder the terms of the Creative Commons Attribution license.-- et al.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.114.101301
URIhttp://hdl.handle.net/10261/140026
DOI10.1103/PhysRevLett.114.101301
Identificadoresdoi: 10.1103/PhysRevLett.114.101301
e-issn: 1079-7114
issn: 0031-9007
Aparece en las colecciones: (IFCA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
bicep.pdf2,48 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


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