Central accumulation of magnetic flux in massive Seyfert galaxies as a possible engine to trigger ultrahigh energy cosmic rays

Anjos, Rita Cassia dos; Coimbra-Araújo, Carlos H.

doi:10.1103/physrevd.96.023008

Cited by 5 publications

(4 citation statements)

References 79 publications

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“…In the case of the first event, this source is NGC 3783 which is a Seyfert 1 galaxy. Seyfert galaxies have been postulated to be possible UHECR accelerators (13). However, it is too far, D > 30 Mpc and not within the horizon that we find for A > 28, which is D ≈ 13 Mpc.…”

Section: Pos(icrc2023)362contrasting

confidence: 78%

Cosmic cartography with UHECRs: Source constraints from individual events at the highest energies

Bourriche,

Capel

2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

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UHECRs at the most extreme energies provide strong constraints on their possible origins. They have a smaller horizon due to energy losses during propagation and are less deflected by intervening magnetic fields. However, studies searching for correlations with nearby sources are limited by the rarity of these events, and the suggested source catalogues often fall short in explaining their origins. We propose to use the reconstructed properties of individual detected UHECRs to map out three-dimensional constraints on the locations of their unknown sources. In this work, we focus on the recently published catalogue of 100 events with energies from 78 to 166 EeV recorded by the Pierre Auger Observatory and use CRPropa 3 to model all relevant propagation effects, including deflections in the Galactic and extra-Galactic magnetic fields. In deriving our location maps, we consider the reconstructed energies and arrival directions of events as well as results on the UHECR composition. We present constraints on the source locations for some of the most restrictive cases and demonstrate the impact of uncertainties in the reconstructed UHECR properties on these results. We also highlight possible astrophysical sources that are compatible with these regions and requirements. This complementary perspective lays the groundwork for building more physically-motivated source catalogues and statistical analyses in the future.

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Section: Pos(icrc2023)362contrasting

confidence: 78%

Cosmic cartography with UHECRs: Source constraints from individual events at the highest energies

Bourriche,

Capel

2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

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“…For examples, the study of particles accelerated by charged rotating black holes (see [1,15]). For further theoretical or phenomenological discussions about the energetic role of the central Kerr BH in the the propagation of UHECRs from AGNs, see [10,11,12,3,4] PoS(BHCB2018)005…”

Section: Final Remarksmentioning

confidence: 99%

Rotating black holes with magnetic fields as accelerators of charged particles

Araújo¹,

Anjos²

2019

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018)

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“…Besides, it is also important to consider magnetic fields since the traditional environment of AGNs consists of a plasma accretion disk surrounding the central black hole. Associated with such accretion phenomena there is the creation of highly relativistic jets and, as well, the dynamics of the accretion disk forms an electrodynamical system which produces magnetic fields as explained by several references [17][18][19][20][21]. Accordingly, the dynamics of the charged particle will be extremely sensitive to the presence of these fields, as will be discussed in Sections III and IV.…”

Section: Introductionmentioning

confidence: 99%

Acceleration of charged particles from near-extremal rotating black holes embedded in magnetic fields

Coimbra-Araújo,

Anjos

2020

Preprint

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The aim of the present article is to evaluate the motion of neutral and charged test particles in the vicinity of a near-extremal rotating black hole in the presence of magnetic fields. Euler-Lagrange motion equations and effective potential methods are used to characterize the motion out of the equatorial plane. Such approach is of peculiar significance if it is considered, e.g., accretion processes onto rotating black holes. In general, investigations concerning accretion focus mostly on the simplest case of particles moving in the equatorial plane. Here it will be considered that particles initially moving around some particular orbit may be perturbed by a kick along the θ direction, giving rise to other possible orbits. We confirm the possibility that ultra high energy cosmic rays would be produced at the very center of AGNs, for a specific range of magnetic field magnitudes, since it is possible that ultra-high center-of-mass energies can be produced by particles colliding near the horizon of rotating black holes whose angular momentum tends to the Thorne limit.

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Central accumulation of magnetic flux in massive Seyfert galaxies as a possible engine to trigger ultrahigh energy cosmic rays

Cited by 5 publications

References 79 publications

Cosmic cartography with UHECRs: Source constraints from individual events at the highest energies

Cosmic cartography with UHECRs: Source constraints from individual events at the highest energies

Rotating black holes with magnetic fields as accelerators of charged particles

Acceleration of charged particles from near-extremal rotating black holes embedded in magnetic fields

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