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COSMIC TRANSIENTS TEST EINSTEIN’S EQUIVALENCE PRINCIPLE OUT TO GeV ENERGIES
Gao,He1,2,3,4,6; Wu,Xue-Feng1,2,5; Mészáros,Peter2,3,4
2015-09-04
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume810Issue:2
AbstractABSTRACT The Einstein Equivalence Principle (EEP) can be probed with astrophysical sources emitting simultaneously different types of neutral particles, or particles with varying energies, by testing their time of flight through the same gravitational field. Here we use the time delays between correlated photons from cosmological transients to constrain the accuracy of the EEP. We take data from two gamma-ray bursts as an example and, as a lower limit to the theoretical time delays between different energies, we use delays arising from only the gravitational field of our own galaxy. We then show that the parameterized post-Newtonian parameter γ is the same for photons over energy ranges between eV and MeV and between MeV and GeV to a part in 10?7, which is at least one order of magnitude better than previous limits. Combining this bound on the wavelength dependence of γ with the absolute bound from light-deflection measurements at optical (eV) wavelengths, we thus extend this absolute bound on γ to GeV energies.
Keywordgamma-ray burst: general gravitation
DOI10.1088/0004-637X/810/2/121
Language英语
WOS IDIOP:0004-637X-810-2-121
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23739
Collection中国科学院紫金山天文台
Affiliation1.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China; xfwu@pmo.ac.cn
2.Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USA
3.Department of Physics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USA
4.Center for Particle and Gravitational Astrophysics, Institute for Gravitation and the Cosmos, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USA
5.Joint Center for Nuclear Particle Physics and Cosmology, Purple Mountain Observatory—Nanjing University, Nanjing 210008, China
6.Department of Astronomy, Beijing Normal University, Beijing 100875, China
Recommended Citation
GB/T 7714
Gao,He,Wu,Xue-Feng,Mészáros,Peter. COSMIC TRANSIENTS TEST EINSTEIN’S EQUIVALENCE PRINCIPLE OUT TO GeV ENERGIES[J]. The Astrophysical Journal,2015,810(2).
APA Gao,He,Wu,Xue-Feng,&Mészáros,Peter.(2015).COSMIC TRANSIENTS TEST EINSTEIN’S EQUIVALENCE PRINCIPLE OUT TO GeV ENERGIES.The Astrophysical Journal,810(2).
MLA Gao,He,et al."COSMIC TRANSIENTS TEST EINSTEIN’S EQUIVALENCE PRINCIPLE OUT TO GeV ENERGIES".The Astrophysical Journal 810.2(2015).
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