Dodging the cosmic curvature to probe the constancy of the speed of light

被引：42

作者：

Cai, Rong-Gen ^{[1
]}

Guo, Zong-Kuan

Yang, Tao

机构：

[1] Chinese Acad Sci, Inst Theoret Phys, Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 08期

基金：

中国国家自然科学基金;

关键词：

Supernova type Ia - standard candles; alternatives to inflation; DARK ENERGY SURVEY; HUBBLE PARAMETER; CONSTRAINTS; EXPANSION; GALAXIES; GROWTH;

D O I：

10.1088/1475-7516/2016/08/016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We develop a new model-independent method to probe the constancy of the speed of light c. In our method, the degeneracy between the cosmic curvature and the speed of light can be eliminated, which makes the test more natural and general. Combining the independent observations of-Hubble parameter H(z) and luminosity distance d(L)(z), we use the model-independent smoothing technique, Gaussian processes, to reconstruct them and then detect variation of the speed of light. We find no signal of deviation from the present value of the speed of light c(0). Moreover, to demonstrate the improvement in probing the constancy of the speed of light from future experiments, we produce a series of simulated data. The Dark Energy Survey will be able to detect Delta c/c(0) similar to 1% at similar to 1.5 sigma confidence level and Delta c/c(0) similar to 2% at similar to 3 sigma confidence level. If the errors are reduced to one-tenth of the expected DES ones, it can detect a Delta c/c(0) similar to 0.1% variation at similar to 2 sigma confidence level.

引用

页数：10

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