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

Autores
Kraiselburd, Lucila; Landau, Susana Judith; 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.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Física
Cosmology: observations
Methods: data analysis
Quasars: absorption lines
Quasars: emission lines
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/85391
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/85391
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Variation of the fine-structure constant: an update of statistical analyses with recent dataKraiselburd, LucilaLandau, Susana JudithSimeone, C.Ciencias AstronómicasFísicaCosmology: observationsMethods: data analysisQuasars: absorption linesQuasars: emission linesAims. 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.Facultad de Ciencias Astronómicas y Geofísicas2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/85391enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201321803info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:29Zoai:sedici.unlp.edu.ar:10915/85391Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:30.186SEDICI (UNLP) - Universidad Nacional de La Platafalse
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, Lucila
Ciencias Astronómicas
Física
Cosmology: observations
Methods: data analysis
Quasars: absorption lines
Quasars: emission lines
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, Lucila
Landau, Susana Judith
Simeone, C.
author Kraiselburd, Lucila
author_facet Kraiselburd, Lucila
Landau, Susana Judith
Simeone, C.
author_role author
author2 Landau, Susana Judith
Simeone, C.
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Física
Cosmology: observations
Methods: data analysis
Quasars: absorption lines
Quasars: emission lines
topic Ciencias Astronómicas
Física
Cosmology: observations
Methods: data analysis
Quasars: absorption lines
Quasars: emission lines
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.
Facultad de Ciencias Astronómicas y Geofísicas
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.
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
Articulo
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://sedici.unlp.edu.ar/handle/10915/85391
url http://sedici.unlp.edu.ar/handle/10915/85391
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201321803
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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