Artículo

Holanda, R.F.L.; Busti, V.C.; Colaço, L.R.; Alcaniz, J.S.; Landau, S.J. "Galaxy clusters, type Ia supernovae and the fine structure constant" (2016) Journal of Cosmology and Astroparticle Physics. 2016(8)
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Abstract:

As is well known, measurements of the Sunyaev-Zeldovich effect can be combined with observations of the X-ray surface brightness of galaxy clusters to estimate the angular diameter distance to these structures. In this paper, we show that this technique depends on the fine structure constant, α. Therefore, if α is a time-dependent quantity, e.g., α = α0φ(z), where φ is a function of redshift, we argue that current data do not provide the real angular diameter distance, DA(z), to the cluster, but instead DA data(z) = φ(z)2 DA(z). We use this result to derive constraints on a possible variation of α for a class of dilaton runaway models considering a sample of 25 measurements of DA data(z) in redshift range 0.023 < z < 0.784 and estimates of DA(z) from current type Ia supernovae observations. We find no significant indication of variation of α with the present data. © 2016 IOP Publishing Ltd and Sissa Medialab srl .

Registro:

Documento: Artículo
Título:Galaxy clusters, type Ia supernovae and the fine structure constant
Autor:Holanda, R.F.L.; Busti, V.C.; Colaço, L.R.; Alcaniz, J.S.; Landau, S.J.
Filiación:Departamento de Física, Universidade Estadual da Paraíba, street Baraúnas, PB, Campina Grande, 58429-500, Brazil
Departamento de Física, Universidade Federal de Campina Grande, street Aprígio Veloso, PB, Campina Grande, 58429-900, Brazil
Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, São Paulo, SP, CEP 05508-090, Brazil
Observatório Nacional, Street José Cristino, Rio de Janeiro, RJ, 20921-400, Brazil
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Viamonte, Buenos Aires, 1053, Argentina
IFIBA, CONICET, Pabellón I, Ciudad Universitaria, Buenos Aires, 1428, Argentina
Departamento de Física, Universidade Federal Do Rio Grande Do Norte, street Joaquim Gregório, Natal, Brazil
Palabras clave:galaxy clusters; modified gravity; supernovas
Año:2016
Volumen:2016
Número:8
DOI: http://dx.doi.org/10.1088/1475-7516/2016/08/055
Título revista:Journal of Cosmology and Astroparticle Physics
Título revista abreviado:J. Cosmol. Astroparticle Phys.
ISSN:14757516
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14757516_v2016_n8_p_Holanda

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Citas:

---------- APA ----------
Holanda, R.F.L., Busti, V.C., Colaço, L.R., Alcaniz, J.S. & Landau, S.J. (2016) . Galaxy clusters, type Ia supernovae and the fine structure constant. Journal of Cosmology and Astroparticle Physics, 2016(8).
http://dx.doi.org/10.1088/1475-7516/2016/08/055
---------- CHICAGO ----------
Holanda, R.F.L., Busti, V.C., Colaço, L.R., Alcaniz, J.S., Landau, S.J. "Galaxy clusters, type Ia supernovae and the fine structure constant" . Journal of Cosmology and Astroparticle Physics 2016, no. 8 (2016).
http://dx.doi.org/10.1088/1475-7516/2016/08/055
---------- MLA ----------
Holanda, R.F.L., Busti, V.C., Colaço, L.R., Alcaniz, J.S., Landau, S.J. "Galaxy clusters, type Ia supernovae and the fine structure constant" . Journal of Cosmology and Astroparticle Physics, vol. 2016, no. 8, 2016.
http://dx.doi.org/10.1088/1475-7516/2016/08/055
---------- VANCOUVER ----------
Holanda, R.F.L., Busti, V.C., Colaço, L.R., Alcaniz, J.S., Landau, S.J. Galaxy clusters, type Ia supernovae and the fine structure constant. J. Cosmol. Astroparticle Phys. 2016;2016(8).
http://dx.doi.org/10.1088/1475-7516/2016/08/055