BEGIN:VCALENDAR VERSION:2.0 PRODID:-//ZContent.net//ZapCalLib 1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT DTSTART;TZID=Atlantic/Canary:20180904T123000 DTEND;TZID=Atlantic/Canary:20180904T133000 UID:iactalks-1188 X-WR-CALNAME: IAC Talks: Open Astronomy Seminars X-ORIGINAL-URL: /iactalks/Talks/view/1188 CREATED:2018-09-04T12:30:00+01:00 X-WR-CALDESC: IAC Talks upcomming talks SUMMARY:Non-Maxwellian electromagnetism in astrophysics and cosmology DESCRIPTION:Non-Maxwellian electromagnetism in astrophysics and cosmology\n Dr. Alessandro D.A.M. Spallicci\n\nInexplicable observations on the Univer se prompt cosmologists to propose either ad hoc explanationsas dark matter and energy maintaining general relativity entirely valid, or to propose a lternatives togeneral relativity, without evoking dark ingredients [7]. Bu t for the former investigation track,experimental confirmations are missin g, and for the latter general relativity continues to predictobservations with exactitude.Confronted with this dichotomy, and with a multi-parametri sed cosmology, we consider legitimate alsoto investigate on the nature of the main messenger from the Universe, light, that we stick so far tointerp ret as Maxwellian. But the photon in the Standard Model singles out as the only massless freeparticle, and the waves emerge from a linear theory of the XIX century. What if light were to bedescribed by a different theory?R esults on testing non-Maxwellian electromagnetism (either massive initiate d by de Broglie and Procaor non-linear by Born and Infeld, Heisenberg and Euler) include setting photon mass upper limits fromthe modified Amp&egrav e;re law in solar wind through the Cluster spacecraft [8], or from frequen cy dependentgroup velocities of photons from Fast Radio Bursts [2,5]. Futu re nanosatellite swarms operating in anew radio-astronomy window, 10 KHz - 10 MHz, [1] might provide a significant contribution.De Broglie formulate d a photon mass already in 1922 and in the later year he estimated such ma ss to belower than 10 -53 kg, surprisingly close to the actual limits esta blished by the Particle Data Group.Meanwhile, an effective photon mass eme rges when Lorentz symmetry is broken in (possibly Super-Symmetrised) Stand ard Model Extensions, as well as bi-refringence and dissipation [3,4].Non- linear effects as polarisation dependent frequency shifts in strong magnet ic field in Magnetars havebeen analysed too [6], but we are now progressin g in modelling a general non-linear electromagnetismLagrangian and look wh ether wave dissipation in vacuum may occur, possibly in presence of abackg round field. When wave dissipation is transferred into photon energy descr iption, we cannot avoidconsidering, additional, non-cosmological redshifts .\n \n[1] Bentum M.J., Bonetti L., Spallicci A.D.A.M., 2017. Adv. Sp. Res., 59, 736.[2] Bonetti L., Ellis J., Mavromatos N.E., Sakharov A.S., S arkisyan-Grinbaum E.K.G., Spallicci A.D.A.M., 2016. Phys. Lett.B, 757, 548 .[3] Bonetti L., dos Santos Filho L.R., Helayël-Neto J.A., Spallicci A.D.A.M., 2017. Phys. Lett. B, 764, 203.[4] Bonetti L., dos Santos Filho L .R., Helayël-Neto J.A., Spallicci A.D.A.M., 2017. arXiv:1709.04995[5] Bonetti L., Ellis J., Mavromatos N.E., Sakharov A.S., Sarkisyan-Grinbaum E.K.G., Spallicci A.D.A.M., 2017. Phys. Lett.B, 768, 326.[6] Bonetti L., P erez Bergliaffa S.E., Spallicci A.D.A.M., 2017, 14 th Marcel Grossmann Mee ting, 12-18 July 2015 Roma, M.Bianchi, R.T. Jantzen, R. Ruffini Eds., Worl d Scientific, 3531.[7] Capozziello S., Prokopec T., Spallicci A.D.A.M., 20 17. Aims and Scopes of the Special Issue: Foundations of Astrophysicsand C osmology, Volume 47, Issue 6.[8] Retinò A., Spallicci A.D.A.M., Vai vads A., 2016. Astropart. Phys., 82, 49. END:VEVENT END:VCALENDAR