Dispersion by pulsars, magnetars, fast radio bursts and massive electromagnetism at very low radio frequencies

Bentum, Mark J.; Bonetti, Luca; Spallicci, A.

doi:10.1016/j.asr.2016.10.018

Cited by 33 publications

(32 citation statements)

References 129 publications

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“…Thirdly, the massive photon group velocity differs from c by a quantity proportional to the inverse of the frequency squared [9][10][11]23]. Such a dependence has been analysed recently with the signals from Fast Radio Bursts (FRBs) [79][80][81][82][83][84][85][86][87][88].…”

Section: Time Dilation and Supernovaementioning

confidence: 99%

Cosmology and the massive photon frequency shift in the Standard-Model Extension

et al. 2021

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The total red shift z might be recast as a combination of the expansion red shift and a static shift due to the energy–momentum tensor non-conservation of a photon propagating through Electro-Magnetic (EM) fields. If massive, the photon may be described by the de Broglie–Proca (dBP) theory which satisfies the Lorentz(-Poincaré) Symmetry (LoSy) but not gauge-invariance. The latter is regained in the Standard-Model Extension (SME), associated with LoSy Violation (LSV) that naturally dresses photons of a mass. The non-conservation stems from the vacuum expectation value of the vector and tensor LSV fields. The final colour (red or blue) and size of the static shift depend on the orientations and strength of the LSV and EM multiple fields encountered along the path of the photon. Turning to cosmology, for a zero $$\Omega _{\Lambda }$$ Ω Λ energy density, the discrepancy between luminosity and red shift distances of SNeIa disappears thanks to the recasting of z. Massive photons induce an effective dark energy acting ‘optically’ but not dynamically.

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Section: Time Dilation and Supernovaementioning

confidence: 99%

Cosmology and the massive photon frequency shift in the Standard-Model Extension

et al. 2021

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“…Here n is average electron density along the line-ofsight, m e and e is the mass and charge of the electron. Equation (5) also implies that higher frequency radio photons pass through the ISM faster than lower frequency ones (see e.g., Bentum et al 2016). …”

Section: Velocity Dispersion From the Plasma Effectmentioning

confidence: 99%

New limits on the photon mass with radio pulsars in the Magellanic clouds

Wei

Zhang

et al. 2017

Res. Astron. Astrophys.

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A conservative constraint on the rest mass of the photon can be estimated under the assumption that the frequency dependence of dispersion from astronomical sources is mainly contributed by the nonzero photon mass effect. Photon mass limits have been earlier set through the optical emissions of the Crab Nebula pulsar, but we prove that these limits can be significantly improved with the dispersion measure (DM) measurements of radio pulsars in the Large and Small Magellanic Clouds. The combination of DM measurements of pulsars and distances of the Magellanic Clouds provide a strict upper limit on the photon mass as low as m γ ≤ 2.0 × 10 −45 g, which is at least four orders of magnitude smaller than the constraint from the Crab Nebula pulsar. Although our limit is not as tight as the current best result (∼ 10 −47 g) from a fast radio burst (FRB 150418) at a cosmological distance, the cosmological origin of FRB 150418 remains under debate; and our limit can reach the same high precision of FRB 150418 when it has an extragalactic origin (∼ 10 −45 g).

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“…Thereby, the photons emitted towards the end of the burst will employ more time than the initial photons to reach an observer. Incidentally, the dependence of the group velocity on the frequency allows us to set upper limits on the photon mass from Fast Radio Bursts (FRBs) [19][20][21][22][23].…”

Section: Conclusion Discussion and Perspectivesmentioning

confidence: 99%

Frequency variation for in vacuo photon propagation in the Standard-Model Extension

Helayël-Neto

Spallicci

2019

Eur. Phys. J. C

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In the presence of Lorentz Symmetry Violation (LSV) associated with the Standard-Model Extension (SME), we have recently shown the non-conservation of the energy-momentum tensor of a light-wave crossing an Electro-Magnetic (EM) background field even when the latter and the LSV are constant. Incidentally, for a space-time dependent LSV, the presence of an EM field is not necessary. Herein, we infer that in a particle description, the energy non-conservation for a photon implies violation of frequency invariance in vacuo, giving rise to a red or blue shift. We discuss the potential consequences on cosmology.

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Dispersion by pulsars, magnetars, fast radio bursts and massive electromagnetism at very low radio frequencies

Cited by 33 publications

References 129 publications

Cosmology and the massive photon frequency shift in the Standard-Model Extension

Cosmology and the massive photon frequency shift in the Standard-Model Extension

New limits on the photon mass with radio pulsars in the Magellanic clouds

Frequency variation for in vacuo photon propagation in the Standard-Model Extension

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