FRB 121102 casts new light on the photon mass

Luca Bonetti (1, 2) , John Ellis (3) , Nikolaos E. Mavromatos (4, 5) , Alexander S. Sakharov (6, 7, 8) , Edward K. Sarkisyan-Grinbaum (6) , Alessandro D. A. M. Spallicci (2, 1)

1 OSUC - Observatoire des Sciences de l'Univers en région Centre
2 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace
3 JPL - Jet Propulsion Laboratory
4 Physics Department
5 Theoretical Physics Department
6 Experimental Physics Department
7 Physics Department
8 Department of Physics [New York]

The photon mass, mγ, can in principle be constrained using measurements of the dispersion measures (DMs) of fast radio bursts (FRBs), once the FRB redshifts are known. The DM of the repeating FRB 121102 is known to <1%, a host galaxy has now been identified with high confidence, and its redshift, z, has now been determined with high accuracy: z=0.19273(8). Taking into account the plasma contributions to the DM from the Intergalactic medium (IGM) and the Milky Way, we use the data on FRB 121102 to derive the constraint mγ2.2 ×10−14eVc−2(3.9 ×10−50kg). Since the plasma and photon mass contributions to DMs have different redshift dependences, they could in principle be distinguished by measurements of more FRB redshifts, enabling the sensitivity to mγto be improved

Domains: Astrophysics [astro-ph]; Astrophysics [astro-ph]

Luca Bonetti, John Ellis, Nikolaos E. Mavromatos, Alexander S. Sakharov, Edward K. Sarkisyan-Grinbaum, et al.. FRB 121102 casts new light on the photon mass. Physics Letters B, 2017, 768, pp.326-329. ⟨10.1016/j.physletb.2017.03.014⟩. ⟨insu-01494286⟩