Bibcode
Planck Collaboration; Ade, P. A. R.; Aghanim, N.; Arnaud, M.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Banday, A. J.; Barreiro, R. B.; Battaner, E.; Benabed, K.; Benoit-Lévy, A.; Bernard, J.-P.; Bersanelli, M.; Bielewicz, P.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Burigana, C.; Butler, R. C.; Calabrese, E.; Chamballu, A.; Chiang, H. C.; Christensen, P. R.; Clements, D. L.; Colombo, L. P. L.; Couchot, F.; Curto, A.; Cuttaia, F.; Danese, L.; Davies, R. D.; Davis, R. J.; de Bernardis, P.; de Rosa, A.; de Zotti, G.; Delabrouille, J.; Diego, J. M.; Dole, H.; Doré, O.; Dupac, X.; Enßlin, T. A.; Eriksen, H. K.; Fabre, O.; Finelli, F.; Forni, O.; Frailis, M.; Franceschi, E.; Galeotta, S.; Galli, S.; Ganga, K.; Giard, M.; González-Nuevo, J.; Górski, K. M.; Gregorio, A.; Gruppuso, A.; Hansen, F. K.; Hanson, D.; Harrison, D. L.; Henrot-Versillé, S.; Hernández-Monteagudo, C.; Herranz, D.; Hildebrandt, S. R.; Hivon, E.; Hobson, M.; Holmes, W. A.; Hornstrup, A.; Hovest, W.; Huffenberger, K. M.; Jaffe, A. H.; Jones, W. C.; Keihänen, E.; Keskitalo, R.; Kneissl, R.; Knoche, J.; Kunz, M.; Kurki-Suonio, H.; Lamarre, J.-M.; Lasenby, A.; Lawrence, C. R.; Leonardi, R.; Lesgourgues, J.; Liguori, M.; Lilje, P. B.; Linden-Vørnle, M.; López-Caniego, M.; Lubin, P. M.; Macías-Pérez, J. F.; Mandolesi, N.; Maris, M.; Martin, P. G.; Martínez-González, E.; Masi, S.; Matarrese, S.; Mazzotta, P.; Meinhold, P. R.; Melchiorri, A.; Mendes, L.; Menegoni, E.; Mennella, A.; Migliaccio, M. et al.
Bibliographical reference
Astronomy and Astrophysics, Volume 580, id.A22, 25 pp.
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8
2015
Journal
Citations
100
Refereed citations
90
Description
Any variation in the fundamental physical constants, more particularly
in the fine structure constant, α, or in the mass of the electron,
me, affects the recombination history of the Universe and
cause an imprint on the cosmic microwave background angular power
spectra. We show that the Planck data allow one to improve the
constraint on the time variation of the fine structure constant at
redshift z ~ 103 by about a factor of 5 compared to WMAP
data, as well as to break the degeneracy with the Hubble constant,
H0. In addition to α, we can set a constraint on the
variation in the mass of the electron, me, and in the
simultaneous variation of the two constants. We examine in detail the
degeneracies between fundamental constants and the cosmological
parameters, in order to compare the limits obtained from Planck and WMAP
and to determine the constraining power gained by including other
cosmological probes. We conclude that independent time variations of the
fine structure constant and of the mass of the electron are constrained
by Planck to Δα/α = (3.6 ± 3.7) ×
10-3 and Δme/me = (4 ± 11)
× 10-3 at the 68% confidence level. We also investigate
the possibility of a spatial variation of the fine structure constant.
The relative amplitude of a dipolar spatial variation in α
(corresponding to a gradient across our Hubble volume) is constrained to
be δα/α = (-2.4 ± 3.7) × 10-2.
Appendices are available in electronic form at http://www.aanda.org
Related projects
Anisotropy of the Cosmic Microwave Background
The general goal of this project is to determine and characterize the spatial and spectral variations in the temperature and polarisation of the Cosmic Microwave Background in angular scales from several arcminutes to several degrees. The primordial matter density fluctuations which originated the structure in the matter distribution of the present
Rafael
Rebolo López