Lorentz-violation-induced vacuum birefringence and its astrophysical consequences

被引：23

作者：

Shao, Lijing ^{[1
]}

Ma, Bo-Qiang

机构：

[1] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW D | 2011年 / 83卷 / 12期

基金：

中国国家自然科学基金;

关键词：

HIGH-ENERGY; POLARIZATION; LIMITS; TESTS;

D O I：

10.1103/PhysRevD.83.127702

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the electromagnetism of loop quantum gravity, two helicities of a photon have different phase velocities and group velocities, termed as "vacuum birefringence". Two novel phenomenons, "peak doubling" and "depolarization", are expected to appear for a linearly polarized light from astrophysical sources. We show that the criteria to observe these two phenomenons are the same. Further, from recently observed gamma-ray polarization from Cygnus X-1, we obtain an upper limit similar to 8: 7 x 10(-12) for the Lorentz-violating parameter chi, which is the most firm constraint from well-known systems. We also suggest analyzing the possible existence of "peak doubling" through Fermi-LAT gamma-ray bursts.

引用

页数：4

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