Constraints on variation in α and m e from WMAP 7-year data

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 w...

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Detalles Bibliográficos
Autores principales:	Landau, S.J., Scóccola, G.
Formato:	JOUR
Materias:	Cosmic background radiation Cosmological parameters Early Universe Cosmic ray measurement Monolithic microwave integrated circuits Radiation Data sets Early universe Electron mass Fine structure constants Sloan Digital Sky Survey Statistical analysis Time variations Cosmology
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00046361_v517_n9_p_Landau
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00046361_v517_n9_p_Landau
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spelling	todo:paper_00046361_v517_n9_p_Landau2023-10-03T14:00:31Z Constraints on variation in α and m e from WMAP 7-year data Landau, S.J. Scóccola, G. 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 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046361_v517_n9_p_Landau
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	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
spellingShingle	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 Landau, S.J. Scóccola, G. Constraints on variation in α and m e from WMAP 7-year data
topic_facet	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
description	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.
format	JOUR
author	Landau, S.J. Scóccola, G.
author_facet	Landau, S.J. Scóccola, G.
author_sort	Landau, S.J.
title	Constraints on variation in α and m e from WMAP 7-year data
title_short	Constraints on variation in α and m e from WMAP 7-year data
title_full	Constraints on variation in α and m e from WMAP 7-year data
title_fullStr	Constraints on variation in α and m e from WMAP 7-year data
title_full_unstemmed	Constraints on variation in α and m e from WMAP 7-year data
title_sort	constraints on variation in α and m e from wmap 7-year data
url	http://hdl.handle.net/20.500.12110/paper_00046361_v517_n9_p_Landau
work_keys_str_mv	AT landausj constraintsonvariationinaandmefromwmap7yeardata AT scoccolag constraintsonvariationinaandmefromwmap7yeardata
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Constraints on variation in α and m e from WMAP 7-year data

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