Constraints on variation in α and m e from WMAP 7-year data
- Autores
- Landau, Susana Judith; Scoccola, Claudia Graciela
- Año de publicación
- 2010
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
Fil: Landau, Susana Judith. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Fil: Scoccola, Claudia Graciela. Gobierno de la Republica Federal de Alemania. Max Planck Institut Fur Astrophysik; Alemania - Materia
-
COSMIC BACKGROUND RADIATION
COSMOLOGICAL PARAMETERS
EARLY UNIVERSE - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/59023
Ver los metadatos del registro completo
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Constraints on variation in α and m e from WMAP 7-year dataLandau, Susana JudithScoccola, Claudia GracielaCOSMIC BACKGROUND RADIATIONCOSMOLOGICAL PARAMETERSEARLY UNIVERSEhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Aims. 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.Fil: Landau, Susana Judith. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Scoccola, Claudia Graciela. Gobierno de la Republica Federal de Alemania. Max Planck Institut Fur Astrophysik; AlemaniaEDP Sciences2010-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/59023Landau, Susana Judith; Scoccola, Claudia Graciela; Constraints on variation in α and m e from WMAP 7-year data; EDP Sciences; Astronomy and Astrophysics; 517; 9; 7-2010; 1-40004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201014215info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:01:04Zoai:ri.conicet.gov.ar:11336/59023instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 12:01:05.204CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Constraints on variation in α and m e from WMAP 7-year data |
| title |
Constraints on variation in α and m e from WMAP 7-year data |
| spellingShingle |
Constraints on variation in α and m e from WMAP 7-year data Landau, Susana Judith COSMIC BACKGROUND RADIATION COSMOLOGICAL PARAMETERS EARLY UNIVERSE |
| 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 |
| dc.creator.none.fl_str_mv |
Landau, Susana Judith Scoccola, Claudia Graciela |
| author |
Landau, Susana Judith |
| author_facet |
Landau, Susana Judith Scoccola, Claudia Graciela |
| author_role |
author |
| author2 |
Scoccola, Claudia Graciela |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
COSMIC BACKGROUND RADIATION COSMOLOGICAL PARAMETERS EARLY UNIVERSE |
| topic |
COSMIC BACKGROUND RADIATION COSMOLOGICAL PARAMETERS EARLY UNIVERSE |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
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. Fil: Landau, Susana Judith. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina Fil: Scoccola, Claudia Graciela. Gobierno de la Republica Federal de Alemania. Max Planck Institut Fur Astrophysik; Alemania |
| 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. |
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2010 |
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2010-07 |
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article |
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http://hdl.handle.net/11336/59023 Landau, Susana Judith; Scoccola, Claudia Graciela; Constraints on variation in α and m e from WMAP 7-year data; EDP Sciences; Astronomy and Astrophysics; 517; 9; 7-2010; 1-4 0004-6361 CONICET Digital CONICET |
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http://hdl.handle.net/11336/59023 |
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Landau, Susana Judith; Scoccola, Claudia Graciela; Constraints on variation in α and m e from WMAP 7-year data; EDP Sciences; Astronomy and Astrophysics; 517; 9; 7-2010; 1-4 0004-6361 CONICET Digital CONICET |
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eng |
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