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题名: COSMIC TRANSIENTS TEST EINSTEIN'S EQUIVALENCE PRINCIPLE OUT TO GeV ENERGIES
作者: Gao, He1, 2, 3, 4, 6; Wu XueFeng(吴雪峰)1, 2, 5; Meszaros, Peter2, 3, 4
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-09-10
卷号: 810, 期号:2, 页码:121
关键词: gamma-ray burst: general ; gravitation
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/810/2/121
文章类型: Article
英文摘要: 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 gamma 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 gamma with the absolute bound vertical bar gamma - 1 vertical bar < 0.3% from light-deflection measurements at optical (eV) wavelengths, we thus extend this absolute bound on gamma to GeV energies.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: GAMMA-RAY BURSTS ; GENERAL-RELATIVITY ; PARAMETER GAMMA ; GRB 080319B ; MILKY-WAY ; TELESCOPE ; EMISSION ; NEUTRINOS ; MISSION ; SEARCH
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000362083700037
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14875
Appears in Collections:南极天文中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
3.Penn State Univ, Dept Phys, Davey Lab 525, University Pk, PA 16802 USA
4.Penn State Univ, Inst Gravitat & Cosmos, Ctr Particle & Gravitat Astrophys, Davey Lab 525, University Pk, PA 16802 USA
5.Nanjing Univ, Purple Mt Observ, Joint Ctr Nucl Particle Phys & Cosmol, Nanjing 210008, Jiangsu, Peoples R China
6.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
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