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

Mostrar todas las versiones(4)

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 t...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Kraiselburd, L., Landau, S.J., Simeone, C.
Formato:	Artículo publishedVersion
Publicado:	2013
Materias:	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
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00046361_v557_n_p_Kraiselburd http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00046361_v557_n_p_Kraiselburd_oai
Aporte de:	Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires

id	I28-R145-paper_00046361_v557_n_p_Kraiselburd_oai
record_format	dspace
spelling	I28-R145-paper_00046361_v557_n_p_Kraiselburd_oai2020-10-19 Kraiselburd, L. Landau, S.J. Simeone, C. 2013 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. application/pdf http://hdl.handle.net/20.500.12110/paper_00046361_v557_n_p_Kraiselburd info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Astron. Astrophys. 2013;557 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 Variation of the fine-structure constant: An update of statistical analyses with recent data info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00046361_v557_n_p_Kraiselburd_oai
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-145
collection	Repositorio Digital de la Universidad de Buenos Aires (UBA)
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
spellingShingle	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 Kraiselburd, L. Landau, S.J. Simeone, C. Variation of the fine-structure constant: An update of statistical analyses with recent data
topic_facet	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
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.
format	Artículo Artículo publishedVersion
author	Kraiselburd, L. Landau, S.J. Simeone, C.
author_facet	Kraiselburd, L. Landau, S.J. Simeone, C.
author_sort	Kraiselburd, L.
title	Variation of the fine-structure constant: An update of statistical analyses with recent data
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
publishDate	2013
url	http://hdl.handle.net/20.500.12110/paper_00046361_v557_n_p_Kraiselburd http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00046361_v557_n_p_Kraiselburd_oai
work_keys_str_mv	AT kraiselburdl variationofthefinestructureconstantanupdateofstatisticalanalyseswithrecentdata AT landausj variationofthefinestructureconstantanupdateofstatisticalanalyseswithrecentdata AT simeonec variationofthefinestructureconstantanupdateofstatisticalanalyseswithrecentdata
_version_	1766026501591924736

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

Ejemplares similares