Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant

被引：3

作者：

Colaco, L. R. ^{[1
]}

Gonzalez, J. E. ^{[1
,2
]}

Holanda, R. F. L. ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Norte, Dept Fis, BR-59072970 Natal, RN, Brazil

[2] Univ Manizales, Fac Ciencias & Ingn, Manizales 170002, Colombia

来源：

EUROPEAN PHYSICAL JOURNAL C | 2021年 / 81卷 / 06期

关键词：

CONSTRAINTS; GALAXY;

D O I：

10.1140/epjc/s10052-021-09319-x

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

A new method based on large scale structure observations is proposed to probe a possible temporal variation of the fine-structure constant (alpha). 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 <mml:mfrac>Delta alpha alpha</mml:mfrac>approximate to-gamma ln(1+z), we obtain limits on the physical properties parameter of the model (gamma) at the level 10-2 (1 sigma). Although our limits are less restrictive than those obtained by quasar spectroscopy, the approach presented here provides new bounds on the possibility of <mml:mfrac>Delta alpha alpha</mml:mfrac>not equal 0 at a different range of redshifts.

引用

页数：9

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