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Abstract:

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. © 2015, Springer Science+Business Media Dordrecht.

Registro:

Documento: Artículo
Título:The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae
Autor:Kraiselburd, L.; Landau, S.J.; Negrelli, C.; García-Berro, E.
Filiación:Grupo de Astrofísica, Relatividad y Cosmología, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, La Plata, 1900, Argentina
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
IFIBA, CONICET, Ciudad Universitaria—Pab. I, Buenos Aires, 1428, Argentina
Carrera del Investigador Científico y Tecnológico, CONICET, Buenos Aires, Argentina
Departament de Física Aplicada, Universitat Politècnica de Catalunya, c/Esteve Terrades 5, Castelldefels, 08860, Spain
Institute for Space Studies of Catalonia, c/Gran Capita 2-4, Edif. Nexus 201, Barcelona, 08034, Spain
Palabras clave:Cosmology: miscellaneous; Quasars: absorption lines; Stars: white dwarfs; Supernovae: general
Año:2015
Volumen:357
Número:1
DOI: http://dx.doi.org/10.1007/s10509-015-2325-4
Título revista:Astrophysics and Space Science
Título revista abreviado:Astrophys. Space Sci.
ISSN:0004640X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004640X_v357_n1_p_Kraiselburd

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Citas:

---------- APA ----------
Kraiselburd, L., Landau, S.J., Negrelli, C. & García-Berro, E. (2015) . The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae. Astrophysics and Space Science, 357(1).
http://dx.doi.org/10.1007/s10509-015-2325-4
---------- CHICAGO ----------
Kraiselburd, L., Landau, S.J., Negrelli, C., García-Berro, E. "The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae" . Astrophysics and Space Science 357, no. 1 (2015).
http://dx.doi.org/10.1007/s10509-015-2325-4
---------- MLA ----------
Kraiselburd, L., Landau, S.J., Negrelli, C., García-Berro, E. "The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae" . Astrophysics and Space Science, vol. 357, no. 1, 2015.
http://dx.doi.org/10.1007/s10509-015-2325-4
---------- VANCOUVER ----------
Kraiselburd, L., Landau, S.J., Negrelli, C., García-Berro, E. The variation of the fine structure constant: testing the dipole model with thermonuclear supernovae. Astrophys. Space Sci. 2015;357(1).
http://dx.doi.org/10.1007/s10509-015-2325-4