Constraints on a possible variation of the fine structure constant from galaxy cluster data
We propose a new method to probe a possible time evolution of the fine structure constant α from X-ray and Sunyaev-Zel'dovich measurements of the gas mass fraction (fgas) in galaxy clusters. Taking into account a direct relation between variations of α and violations of the distance-duality rel...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_14757516_v2016_n5_p_Holanda |
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todo:paper_14757516_v2016_n5_p_Holanda2023-10-03T16:18:50Z Constraints on a possible variation of the fine structure constant from galaxy cluster data Holanda, R.F.L. Landau, S.J. Alcaniz, J.S. Sánchez, G.I.E. Busti, V.C. galaxy clusters Sunyaev-Zeldovich effect X-rays We propose a new method to probe a possible time evolution of the fine structure constant α from X-ray and Sunyaev-Zel'dovich measurements of the gas mass fraction (fgas) in galaxy clusters. Taking into account a direct relation between variations of α and violations of the distance-duality relation, we discuss constraints on α for a class of dilaton runaway models. Although not yet competitive with bounds from high-z quasar absorption systems, our constraints, considering a sample of 29 measurements of fgas, in the redshift interval 0.14 < z < 0.89, provide an independent estimate of α variation at low and intermediate redshifts. Furthermore, current and planned surveys will provide a larger amount of data and thus allow to improve the limits on α variation obtained in the present analysis. © 2016 IOP Publishing Ltd and Sissa Medialab srl . Fil:Landau, S.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14757516_v2016_n5_p_Holanda |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
galaxy clusters Sunyaev-Zeldovich effect X-rays |
| spellingShingle |
galaxy clusters Sunyaev-Zeldovich effect X-rays Holanda, R.F.L. Landau, S.J. Alcaniz, J.S. Sánchez, G.I.E. Busti, V.C. Constraints on a possible variation of the fine structure constant from galaxy cluster data |
| topic_facet |
galaxy clusters Sunyaev-Zeldovich effect X-rays |
| description |
We propose a new method to probe a possible time evolution of the fine structure constant α from X-ray and Sunyaev-Zel'dovich measurements of the gas mass fraction (fgas) in galaxy clusters. Taking into account a direct relation between variations of α and violations of the distance-duality relation, we discuss constraints on α for a class of dilaton runaway models. Although not yet competitive with bounds from high-z quasar absorption systems, our constraints, considering a sample of 29 measurements of fgas, in the redshift interval 0.14 < z < 0.89, provide an independent estimate of α variation at low and intermediate redshifts. Furthermore, current and planned surveys will provide a larger amount of data and thus allow to improve the limits on α variation obtained in the present analysis. © 2016 IOP Publishing Ltd and Sissa Medialab srl . |
| format |
JOUR |
| author |
Holanda, R.F.L. Landau, S.J. Alcaniz, J.S. Sánchez, G.I.E. Busti, V.C. |
| author_facet |
Holanda, R.F.L. Landau, S.J. Alcaniz, J.S. Sánchez, G.I.E. Busti, V.C. |
| author_sort |
Holanda, R.F.L. |
| title |
Constraints on a possible variation of the fine structure constant from galaxy cluster data |
| title_short |
Constraints on a possible variation of the fine structure constant from galaxy cluster data |
| title_full |
Constraints on a possible variation of the fine structure constant from galaxy cluster data |
| title_fullStr |
Constraints on a possible variation of the fine structure constant from galaxy cluster data |
| title_full_unstemmed |
Constraints on a possible variation of the fine structure constant from galaxy cluster data |
| title_sort |
constraints on a possible variation of the fine structure constant from galaxy cluster data |
| url |
http://hdl.handle.net/20.500.12110/paper_14757516_v2016_n5_p_Holanda |
| work_keys_str_mv |
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1807323191773757440 |