Academic Journal
Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant
| العنوان: | Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant |
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| المؤلفون: | L. R. Colaço, J. E. Gonzalez, R. F. L. Holanda |
| المصدر: | European Physical Journal C: Particles and Fields, Vol 81, Iss 6, Pp 1-9 (2021) |
| بيانات النشر: | SpringerOpen, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Astrophysics LCC:Nuclear and particle physics. Atomic energy. Radioactivity |
| مصطلحات موضوعية: | Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798 |
| الوصف: | Abstract A new method based on large scale structure observations is proposed to probe a possible temporal variation of the fine-structure constant ( $$\alpha $$ α ). Our analyses are based on time-delay of Strong Gravitational Lensing and Type Ia Supernovae observations. By considering the runaway dilaton scenario, where the cosmological temporal evolution of the fine-structure constant is given by $$\frac{\Delta \alpha }{\alpha } \approx -\gamma \ln {(1+z)}$$ Δ α α ≈ - γ ln ( 1 + z ) , we obtain limits on the physical properties parameter of the model ( $$\gamma $$ γ ) at the level $$10^{-2}$$ 10 - 2 ( $$1\sigma $$ 1 σ ). Although our limits are less restrictive than those obtained by quasar spectroscopy, the approach presented here provides new bounds on the possibility of $$\frac{\Delta \alpha }{\alpha } \ne 0$$ Δ α α ≠ 0 at a different range of redshifts. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1434-6044 1434-6052 |
| Relation: | https://doaj.org/toc/1434-6044; https://doaj.org/toc/1434-6052 |
| DOI: | 10.1140/epjc/s10052-021-09319-x |
| URL الوصول: | https://doaj.org/article/60bfbc0d520e43f299d71ce3def515d1 |
| رقم الانضمام: | edsdoj.60bfbc0d520e43f299d71ce3def515d1 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 14346044 14346052 |
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| DOI: | 10.1140/epjc/s10052-021-09319-x |