Variation of the fine-structure constant: An update of statistical analyses with recent data

Autores
Kraiselburd, L.; Landau, S.J.; Simeone, C.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Aims. We analyze the consistency of different astronomical data of the variation in the fine-structure constant obtained with Keck and VLT. Methods. We tested the consistency using the Student test and confidence intervals. We splited the data sets into smaller intervals and grouped them according to redshift and angular position. Another statistical analysis is proposed that considers phenomenological models for the variation in α. Results. Results show consistency for the reduced intervals for each pair of data sets and suggests that the variation in α is significant at higher redshifts. Conclusions. Even though the dipole model seems to be the most accurate phenomenological model, the statistical analyses indicate that the variation in α might be depending on both redshift and angular position. © 2013 ESO.
Fil:Landau, S.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Simeone, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Astron. Astrophys. 2013;557
Materia
Cosmology: observations
Methods: data analysis
Quasars: absorption lines
Quasars: emission lines
Confidence interval
Cosmology: observation
Fine structure constants
Methods:data analysis
Phenomenological modeling
Phenomenological models
Quasars: emission line
Quasars:absorption lines
Astronomy
Astrophysics
Statistical methods
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_00046361_v557_n_p_Kraiselburd
Acceder
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oai_identifier_str paperaa:paper_00046361_v557_n_p_Kraiselburd
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling Variation of the fine-structure constant: An update of statistical analyses with recent dataKraiselburd, L.Landau, S.J.Simeone, C.Cosmology: observationsMethods: data analysisQuasars: absorption linesQuasars: emission linesConfidence intervalCosmology: observationFine structure constantsMethods:data analysisPhenomenological modelingPhenomenological modelsQuasars: emission lineQuasars:absorption linesAstronomyAstrophysicsStatistical methodsAims. We analyze the consistency of different astronomical data of the variation in the fine-structure constant obtained with Keck and VLT. Methods. We tested the consistency using the Student test and confidence intervals. We splited the data sets into smaller intervals and grouped them according to redshift and angular position. Another statistical analysis is proposed that considers phenomenological models for the variation in α. Results. Results show consistency for the reduced intervals for each pair of data sets and suggests that the variation in α is significant at higher redshifts. Conclusions. Even though the dipole model seems to be the most accurate phenomenological model, the statistical analyses indicate that the variation in α might be depending on both redshift and angular position. © 2013 ESO.Fil:Landau, S.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Simeone, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_00046361_v557_n_p_KraiselburdAstron. Astrophys. 2013;557reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-29T13:42:54Zpaperaa:paper_00046361_v557_n_p_KraiselburdInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-29 13:42:55.957Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Variation of the fine-structure constant: An update of statistical analyses with recent data
title Variation of the fine-structure constant: An update of statistical analyses with recent data
spellingShingle Variation of the fine-structure constant: An update of statistical analyses with recent data
Kraiselburd, L.
Cosmology: observations
Methods: data analysis
Quasars: absorption lines
Quasars: emission lines
Confidence interval
Cosmology: observation
Fine structure constants
Methods:data analysis
Phenomenological modeling
Phenomenological models
Quasars: emission line
Quasars:absorption lines
Astronomy
Astrophysics
Statistical methods
title_short Variation of the fine-structure constant: An update of statistical analyses with recent data
title_full Variation of the fine-structure constant: An update of statistical analyses with recent data
title_fullStr Variation of the fine-structure constant: An update of statistical analyses with recent data
title_full_unstemmed Variation of the fine-structure constant: An update of statistical analyses with recent data
title_sort Variation of the fine-structure constant: An update of statistical analyses with recent data
dc.creator.none.fl_str_mv Kraiselburd, L.
Landau, S.J.
Simeone, C.
author Kraiselburd, L.
author_facet Kraiselburd, L.
Landau, S.J.
Simeone, C.
author_role author
author2 Landau, S.J.
Simeone, C.
author2_role author
author
dc.subject.none.fl_str_mv Cosmology: observations
Methods: data analysis
Quasars: absorption lines
Quasars: emission lines
Confidence interval
Cosmology: observation
Fine structure constants
Methods:data analysis
Phenomenological modeling
Phenomenological models
Quasars: emission line
Quasars:absorption lines
Astronomy
Astrophysics
Statistical methods
topic Cosmology: observations
Methods: data analysis
Quasars: absorption lines
Quasars: emission lines
Confidence interval
Cosmology: observation
Fine structure constants
Methods:data analysis
Phenomenological modeling
Phenomenological models
Quasars: emission line
Quasars:absorption lines
Astronomy
Astrophysics
Statistical methods
dc.description.none.fl_txt_mv Aims. We analyze the consistency of different astronomical data of the variation in the fine-structure constant obtained with Keck and VLT. Methods. We tested the consistency using the Student test and confidence intervals. We splited the data sets into smaller intervals and grouped them according to redshift and angular position. Another statistical analysis is proposed that considers phenomenological models for the variation in α. Results. Results show consistency for the reduced intervals for each pair of data sets and suggests that the variation in α is significant at higher redshifts. Conclusions. Even though the dipole model seems to be the most accurate phenomenological model, the statistical analyses indicate that the variation in α might be depending on both redshift and angular position. © 2013 ESO.
Fil:Landau, S.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Simeone, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description Aims. We analyze the consistency of different astronomical data of the variation in the fine-structure constant obtained with Keck and VLT. Methods. We tested the consistency using the Student test and confidence intervals. We splited the data sets into smaller intervals and grouped them according to redshift and angular position. Another statistical analysis is proposed that considers phenomenological models for the variation in α. Results. Results show consistency for the reduced intervals for each pair of data sets and suggests that the variation in α is significant at higher redshifts. Conclusions. Even though the dipole model seems to be the most accurate phenomenological model, the statistical analyses indicate that the variation in α might be depending on both redshift and angular position. © 2013 ESO.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12110/paper_00046361_v557_n_p_Kraiselburd
url http://hdl.handle.net/20.500.12110/paper_00046361_v557_n_p_Kraiselburd
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Astron. Astrophys. 2013;557
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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score 13.070432

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