Artículo
Landau, S.J.; Scóccola, G. "Constraints on variation in α and m e from WMAP 7-year data" (2010) Astronomy and Astrophysics. 517(9)
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Abstract:
Aims. We update the constraints on the time variation of the fine structure constant α and the electron mass me, using the latest CMB data, including the 7-yr release of WMAP. Methods. We made statistical analyses of the variation of each one of the constants and of their joint variation, together with the basic set of cosmological parameters. We used a modified version of CAMB and COSMOMC to account for these possible variations. Results. We present bounds on the variation of the constants for different data sets, and show how results depend on them. When using the latest CMB data plus the power spectrum from Sloan Digital Sky Survey LRG, we find that α/α0 = 0.986 ± 0.007 at 1-σ level, when the 6 basic cosmological parameters were fitted, and only variation in α was allowed. The constraints in the case of variation of both constants are α/α0 = 0.986 ± 0.009 and me/me0 = 0.999 ± 0.035. In the case of only variation in me, the bound is me/m e0 = 0.964 ± 0.025. © 2010 ESO.
Registro:
| Documento: | Artículo |
| Título: | Constraints on variation in α and m e from WMAP 7-year data |
| Autor: | Landau, S.J.; Scóccola, G. |
| Filiación: | Departamento de Física, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 1, 1428 Buenos Aires, Argentina Max-Planck-Institut für Astrophysik, Karl-Schwarzschild Str. 1, Postfach 1317, 85741 Garching, Germany |
| Palabras clave: | Cosmic background radiation; Cosmological parameters; Early Universe; Cosmic ray measurement; Monolithic microwave integrated circuits; Radiation; Cosmic background radiation; Cosmological parameters; Data sets; Early universe; Electron mass; Fine structure constants; Sloan Digital Sky Survey; Statistical analysis; Time variations; Cosmology |
| Año: | 2010 |
| Volumen: | 517 |
| Número: | 9 |
| DOI: | http://dx.doi.org/10.1051/0004-6361/201014215 |
| Título revista: | Astronomy and Astrophysics |
| Título revista abreviado: | Astron. Astrophys. |
| ISSN: | 00046361 |
| CODEN: | AAEJA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v517_n9_p_Landau |
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Citas:
---------- APA ----------
Landau, S.J. & Scóccola, G. (2010) . Constraints on variation in α and m e from WMAP 7-year data. Astronomy and Astrophysics, 517(9).http://dx.doi.org/10.1051/0004-6361/201014215
---------- CHICAGO ----------
Landau, S.J., Scóccola, G. "Constraints on variation in α and m e from WMAP 7-year data" . Astronomy and Astrophysics 517, no. 9 (2010).http://dx.doi.org/10.1051/0004-6361/201014215
---------- MLA ----------
Landau, S.J., Scóccola, G. "Constraints on variation in α and m e from WMAP 7-year data" . Astronomy and Astrophysics, vol. 517, no. 9, 2010.http://dx.doi.org/10.1051/0004-6361/201014215
---------- VANCOUVER ----------
Landau, S.J., Scóccola, G. Constraints on variation in α and m e from WMAP 7-year data. Astron. Astrophys. 2010;517(9).http://dx.doi.org/10.1051/0004-6361/201014215
