Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/46441COMPARTIR / EXPORTAR:
 SHARE
 CORE
BASE
|
|
| Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
| Título: | Planck early results. XVIII. The power spectrum of cosmic infrared background anisotropies |
Autor: | Barreiro, R. Belén CSIC ORCID ; Fosalba, Pablo CSIC ORCID; Herranz, D. CSIC ORCID ; López-Caniego, M. CSIC ORCID; Martínez-González, Enrique CSIC ORCID ; Vielva, Patricio CSIC ORCID | Palabras clave: | Diffuse radiation Submillimeter: diffuse background Submillimeter: galaxies Cosmology: observations |
Fecha de publicación: | dic-2011 | Editor: | EDP Sciences | Citación: | Astronomy and Astrophysics 536: A18 (2011) | Resumen: | Using Planck maps of six regions of low Galactic dust emission with a total area of about 140 deg2, we determine the angular power spectra of cosmic infrared background (CIB) anisotropies from multipole ℓ = 200 to ℓ = 2000 at 217, 353, 545 and 857 GHz. We use 21-cm observations of Hi as a tracer of thermal dust emission to reduce the already low level of Galactic dust emission and use the 143 GHz Planck maps in these fields to clean out cosmic microwave background anisotropies. Both of these cleaning processes are necessary to avoid significant contamination of the CIB signal. We measure correlated CIB structure across frequencies. As expected, the correlation decreases with increasing frequency separation, because the contribution of high-redshift galaxies to CIB anisotropies increases with wavelengths. We find no significant difference between the frequency spectrum of the CIB anisotropies and the CIB mean, with ΔI / I = 15% from 217 to 857 GHz. In terms of clustering properties, the Planck data alone rule out the linear scale- and redshift-independent bias model. Non-linear corrections are significant. Consequently, we develop an alternative model that couples a dusty galaxy, parametric evolution model with a simple halo-model approach. It provides an excellent fit to the measured anisotropy angular power spectra and suggests that a different halo occupation distribution is required at each frequency, which is consistent with our expectation that each frequency is dominated by contributions from different redshifts. In our best-fit model, half of the anisotropy power at ℓ = 2000 comes from redshifts z < 0.8 at 857 GHz and z < 1.5 at 545 GHz, while about 90% come from redshifts z > 2 at 353 and 217 GHz, respectively. | Descripción: | 30 páginas, 21 figuras, 7 tablas.-- Planck Collaboration: et al. | Versión del editor: | http://dx.doi.org/10.1051/0004-6361/201116461 | URI: | http://hdl.handle.net/10261/46441 | DOI: | 10.1051/0004-6361/201116461 | ISSN: | 0004-6361 | E-ISSN: | 1432-0746 |
| Aparece en las colecciones: | (IFCA) Artículos |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| aa16461-11[1].pdf | 2,48 MB | Adobe PDF |  Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
91
checked on 11-abr-2024
WEB OF SCIENCETM
Citations
75
checked on 26-feb-2024
Page view(s)
260
checked on 18-abr-2024
Download(s)
60
checked on 18-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.