Sources of the Ultra-High Energy Cosmic Rays (UHECRs) (Part II)

Abstract

It has recently been postulated that protons are accelerated up to energies of 19 10 eV p E ≥ from nearby Seyfert galaxies which harbor Kerr holes in the center of their hosts. Here, we point out that the relativistic force equation of protons is governed by the Lorentz force when using the post-Newtonian approximation. The synchroton emission from nonthermal relativistic protons has to be ruled out. We carefully discuss the origin of the magnetic field close to the event horizon of a black hole. Subject AreasModern Physics

Sources of the Ultra-High Energy Cosmic Rays

“…But there are some signatures that nuclear jets are common features in Seyfert galaxies [14]. The Seyfert galaxies from [1] show small radio jets only: e.g. NGC 4051 shows a radio jet scale length of 0.3 pc [15].…”

“…rad f represents the energy loss by synchrotorn radiation and the curvature energy ("tidal radiation") [4]. In Figure 1 of Wirsich [1] we have chosen a scale length of 10 g r , where…”

“…Studying Figure 1 in Wirsich [1], it appears that the magnetic field has its origin in the black hole. However, this is not the case, since this would contradict the non-hair theorem.…”

“…This is the GZK cutoff (see e.g. [1]). The extragalactic protons not deflected by magnetic fields would have to point to their sources.…”

“…In Wirsich [1], we have presented the new idea that some local Seyfert galaxies that host supermassive Kerr holes in their nucleus are candidates of astrophysical sources of the UHECRs. In extension of the paper [1], we present in this study the relativistic force equation of a proton (Section 2) by applying the post-Newtonian approximation. In Section 3, we discuss the origin of the magnetic field, by emphasizing the dynamical character of black holes (spin-paradigm).…”