scholarly journals Testing the Einstein's equivalence principle with polarized gamma-ray bursts

2017 ◽  
Vol 469 (1) ◽  
pp. L36-L38 ◽  
Author(s):  
Chao Yang ◽  
Yuan-Chuan Zou ◽  
Yue-Yang Zhang ◽  
Bin Liao ◽  
Wei-Hua Lei
Keyword(s):  
Equivalence Principle ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Einstein's Equivalence Principle

scholarly journals Constraints on equivalence principle violation from gamma ray bursts

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
D. J. Bartlett ◽  
D. Bergsdal ◽  
H. Desmond ◽  
P. G. Ferreira ◽  
J. Jasche
Keyword(s):  
Equivalence Principle ◽  
Gamma Ray ◽  
Gamma Ray Bursts

scholarly journals Constraining Einstein’s equivalence principle with multiwavelength polarized astrophysical sources

2020 ◽  
Vol 498 (3) ◽  
pp. 4295-4302
Author(s):  
Shuang-Xi Yi ◽  
Yuan-Chuan Zou ◽  
Jun-Jie Wei ◽  
Qi-Qi Zhou
Keyword(s):  
Equivalence Principle ◽  
Time Delays ◽  
Gamma Ray ◽  
Polarization Measurement ◽  
Radio Sources ◽  
Polarization Rotation ◽  
Milky Way Galaxy ◽  
Upper Limits ◽  
Single Polarization ◽  
Einstein's Equivalence Principle

ABSTRACT The observed time delays between photons with different circular polarizations from an astrophysical object provide a new, interesting way of testing the Einstein Equivalence Principle (EEP). In this paper, we constrain the EEP by considering both Shapiro time delay and Faraday rotation effects. We continue to search for astronomical sources that are suitable for testing the EEP accuracy, and obtain 60 extragalactic radio sources with multiwavelength polarization angles in three different radio bands (20, 8.6, and 4.8 GHz) and 29 brightest stars within our own Milky Way galaxy with multicolour linear polarimetric data in five optical bands (UBVRI). We apply the Metropolis–Hastings Markov Chain to simulate the fit parameters. The final results show that the values of the parametrized post-Newtonian parameter γ discrepancy (Δγp) are constrained to be in the range of 10−26 − 10−23 for 60 radio sources and in the range of 10−23 − 10−20 for 29 optical polarization stars. Compared to previous EEP tests that based on the single polarization measurement in the gamma-ray band, our results have profound superiority that nearly a few tens of astrophysical sources with multiwavelength polarization observations commonly in the optical and radio bands are available. It ensures that these sources can give more significantly robust bounds on the EEP. Although the presented method is straightforward, the resulting constraints on the EEP should be taken as upper limits as other more complex astrophysical effects affecting a polarization rotation are hardly considered.

On the nature of cosmic gamma-ray bursts

1996 ◽  
Vol 166 (7) ◽  
pp. 743-762 ◽  
Author(s):  
B.I. Luchkov ◽  
I.G. Mitrofanov ◽  
I.L. Rozental'
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Bursts

Cosmic gamma-ray bursts and soft gamma-repeaters — observations and modeling of extreme astrophysical phenomena (100th anniversary of the Ioffe Institute)

2018 ◽  
Vol 189 (08) ◽  
pp. 785-802 ◽  
Author(s):  
Rafail L. Aptekar ◽  
Andrei M. Bykov ◽  
Sergei V. Golenetskii ◽  
Dmitrii D. Frederiks ◽  
Dmitry S. Svinkin ◽  
...  
Keyword(s):  
Gamma Ray ◽  
100Th Anniversary ◽  
Gamma Ray Bursts ◽  
Soft Gamma Repeaters ◽  
Ioffe Institute ◽  
Astrophysical Phenomena
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