Testing Einstein's Equivalence Principle with Supercluster Laniakea's Gravitational Field

Comparing the parameterized post-Newtonian parameter \(\gamma\) values for different types of particles, or the same type of particles with different energies is an important method to test the Einstein Equivalence Principle (EEP). Assuming that the observed time delays are dominated by the gravitat...

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Bibliographic Details
Published in:arXiv.org 2016-04
Main Authors: Zhi-Xing Luo, Zhang, Bo, Jun-Jie, Wei, Xue-Feng, Wu
Format: Article
Language:English
Subjects:
Blazars
Bursting strength
Equivalence principle
Galaxies
Gamma ray bursts
Gamma rays
Gravitation
Gravitational fields
Photons
Radio bursts
Test procedures
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Summary:Comparing the parameterized post-Newtonian parameter \(\gamma\) values for different types of particles, or the same type of particles with different energies is an important method to test the Einstein Equivalence Principle (EEP). Assuming that the observed time delays are dominated by the gravitational potential of the Laniakea supercluster of galaxies, better results of EEP constraints can be obtained. In this paper, we apply photons from three kinds of cosmic transients, including TeV blazars, gamma-ray bursts as well as fast radio bursts to constrain EEP. With a gravitational field far more stronger than a single galaxy, we obtain 4--5 orders of magnitude more stringent than the pervious results.
ISSN:2331-8422