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Upper limits on Einstein's weak equivalence principle placed by uncertainties of dispersion measures of fast radio bursts
- Source :
- Hashimoto, T, Goto, T, Santos, D J D, Ho, S C-C, Hsiao, T Y-Y, Wong, Y H V, On, A Y L, Kim, S J, Lu, T-Y & Kilerci-Eser, E 2021, ' Upper limits on Einstein's weak equivalence principle placed by uncertainties of dispersion measures of fast radio bursts ', Physical Review D, vol. 104, no. 12, 124026 . https://doi.org/10.1103/PhysRevD.104.124026
- Publication Year :
- 2021
- Publisher :
- American Physical Society, 2021.
-
Abstract
- Fast radio bursts (FRBs) are astronomical transients with millisecond timescales occurring at cosmological distances. The observed time lag between different energies of each FRB is well described by the inverse-square law of the observed frequency, i.e., dispersion measure. Therefore, FRBs provide one of the ideal laboratories to test Einstein's weak equivalence principle (WEP): the hypothetical time lag between photons with different energies under a gravitational potential. If WEP is violated, such evidence should be exposed within the observational uncertainties of dispersion measures, unless the WEP violation also depends on the inverse-square of the observed frequency. In this work, we constrain the difference of gamma parameters ($\Delta\gamma$) between photons with different energies using the observational uncertainties of FRB dispersion measures, where $\Delta\gamma=0$ for Einstein's general relativity. Adopting the averaged 'Shapiro time delay' for cosmological sources, FRB 121002 at $z=1.6\pm0.3$ and FRB 180817.J1533+42 at $z=1.0\pm0.2$ place the most stringent constraints of $\log\Delta\gamma<br />Comment: Accepted for publication in Physical Review D. A summary video is available at https://youtu.be/Rt7tXN02wpQ
- Subjects :
- High Energy Astrophysical Phenomena (astro-ph.HE)
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
QB460-466 Astrophysics
Astrophysics::High Energy Astrophysical Phenomena
Astrophysics of Galaxies (astro-ph.GA)
REIONIZATION HISTORY
TESTS
FOS: Physical sciences
General Relativity and Quantum Cosmology (gr-qc)
Astrophysics - High Energy Astrophysical Phenomena
Astrophysics - Astrophysics of Galaxies
General Relativity and Quantum Cosmology
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Hashimoto, T, Goto, T, Santos, D J D, Ho, S C-C, Hsiao, T Y-Y, Wong, Y H V, On, A Y L, Kim, S J, Lu, T-Y & Kilerci-Eser, E 2021, ' Upper limits on Einstein's weak equivalence principle placed by uncertainties of dispersion measures of fast radio bursts ', Physical Review D, vol. 104, no. 12, 124026 . https://doi.org/10.1103/PhysRevD.104.124026
- Accession number :
- edsair.doi.dedup.....a1109c06d97d5254d2b9477043e0512b
- Full Text :
- https://doi.org/10.1103/PhysRevD.104.124026