The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae

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The large-number hypothesis conjectures that fundamental constants may vary. Accordingly, the space-time variation of fundamental constants has been an active subject of research for decades. Recently, using data obtained with large telescopes a phenomenological model in which the fine structure con...

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Autores principales: Kraiselburd, Lucila, Landau, Susana J., Negrelli, Carolina Soledad, García Berro, Enrique
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
Quasars: absorption lines
Cosmology: miscellaneous
Stars: white dwarfs
Supernovae: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127304
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127304
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Quasars: absorption lines
Cosmology: miscellaneous
Stars: white dwarfs
Supernovae: general
spellingShingle Ciencias Astronómicas
Quasars: absorption lines
Cosmology: miscellaneous
Stars: white dwarfs
Supernovae: general
Kraiselburd, Lucila
Landau, Susana J.
Negrelli, Carolina Soledad
García Berro, Enrique
The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae
topic_facet Ciencias Astronómicas
Quasars: absorption lines
Cosmology: miscellaneous
Stars: white dwarfs
Supernovae: general
description The large-number hypothesis conjectures that fundamental constants may vary. Accordingly, the space-time variation of fundamental constants has been an active subject of research for decades. Recently, using data obtained with large telescopes a phenomenological model in which the fine structure constant might vary spatially has been proposed. We test whether this hypothetical spatial variation of α, which follows a dipole law, is compatible with the data of distant thermonuclear supernovae. Unlike previous works, in our calculations we consider not only the variation of the luminosity distance when a varying α is adopted, but we also take into account the variation of the peak luminosity of Type Ia supernovae resulting from a variation of α. This is done using an empirical relation for the peak bolometric magnitude of thermonuclear supernovae that correctly reproduces the results of detailed numerical simulations. We find that there is no significant difference between the several phenomenological models studied here and the standard one, in which α does not vary spatially. We conclude that the present set of data of Type Ia supernovae is not able to distinguish the standard model from the dipole models, and thus cannot be used to discard nor to confirm the proposed spatial variation of α.
format Articulo
Preprint
author Kraiselburd, Lucila
Landau, Susana J.
Negrelli, Carolina Soledad
García Berro, Enrique
author_facet Kraiselburd, Lucila
Landau, Susana J.
Negrelli, Carolina Soledad
García Berro, Enrique
author_sort Kraiselburd, Lucila
title The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae
title_short The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae
title_full The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae
title_fullStr The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae
title_full_unstemmed The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae
title_sort variation of the fine structure constant: testing the dipole model with thermonuclear supernovae
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/127304
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bdutipo_str Repositorios
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