Impact of the Magnetic Horizon on the Interpretation of the Pierre Auger Observatory Spectrum and Composition Data
Creators: name: The Pierre Auger Collaboration
name: Halim, A. Abdul
name: Abreu, P.
name: Aglietta, M.
name: Allekotte, I.
name: Cheminant, K. Almeida
name: Almela, A.
name: Aloisio, R.
name: Alvarez-Muñiz, J.
name: Yebra, J. Ammerman
name: Anastasi, G. A.
name: Anchordoqui, L.
name: Andrada, B.
name: Andringa, S.
name: Apollonio, L.
name: Aramo, C.
name: Ferreira, P. R. Araújo
name: Arnone, E.
name: Velázquez, J. C. Arteaga
name: Assis, P.
name: Avila, G.
name: Avocone, E.
name: Bakalova, A.
name: Barbato, F.
name: Mocellin, A. Bartz
name: Bellido, J. A.
name: Berat, C.
name: Bertaina, M. E.
name: Bhatta, G.
name: Bianciotto, M.
name: Biermann, P. L.
name: Binet, V.
name: Bismark, K.
name: Bister, T.
name: Biteau, J.
name: Blazek, J.
name: Bleve, C.
name: Blümer, J.
name: Boháčová, M.
name: Boncioli, D.
name: Bonifazi, C.
name: Arbeletche, L. Bonneau
name: Borodai, N.
name: Brack, J.
name: Orchera, P. G. Brichetto
name: Briechle, F. L.
name: Bueno, A.
name: Buitink, S.
name: Buscemi, M.
name: Büsken, M.
name: Bwembya, A.
name: Caballero-Mora, K. S.
name: Cabana-Freire, S.
name: Caccianiga, L.
name: Campuzano, F.
name: Caruso, R.
name: Castellina, A.
name: Catalani, F.
name: Cataldi, G.
name: Cazon, L.
name: Cerda, M.
name: Cermenati, A.
name: Chinellato, J. A.
name: Chudoba, J.
name: Chytka, L.
name: Clay, R. W.
name: Cerutti, A. C. Cobos
name: Colalillo, R.
name: Coluccia, M. R.
name: Conceição, R.
name: Condorelli, A.
name: Consolati, G.
name: Conte, M.
name: Convenga, F.
name: Santos, D. Correia dos
name: Costa, P. J.
name: Covault, C. E.
name: Cristinziani, M.
name: Sanchez, C. S. Cruz
name: Dasso, S.
name: Daumiller, K.
name: Dawson, B. R.
name: de Almeida, R. M.
name: de Jesús, J.
name: de Jong, S. J.
name: Neto, J. R. T. de Mello
name: De Mitri, I.
name: de Oliveira, J.
name: Franco, D. de Oliveira
name: de Palma, F.
name: de Souza, V.
name: de Errico, B. P. de Souza
name: De Vito, E.
name: Del Popolo, A.
name: Deligny, O.
name: Denner, N.
name: Deval, L.
name: di Matteo, A.
name: Dobre, M.
name: Dobrigkeit, C.
name: D'Olivo, J. C.
name: Mendes, L. M. Domingues
name: Dorosti, Q.
name: Anjos, J. C. dos
name: Anjos, R. C. dos
name: Ebr, J.
name: Ellwanger, F.
name: Emam, M.
name: Engel, R.
name: Epicoco, I.
name: Erdmann, M.
name: Etchegoyen, A.
name: Evoli, C.
name: Falcke, H.
name: Farrar, G.
name: Fauth, A. C.
name: Feldbusch, F.
name: Fenu, F.
name: Fernandes, A.
name: Fick, B.
name: Figueira, J. M.
name: Filipčič, A.
name: Fitoussi, T.
name: Flaggs, B.
name: Fodran, T.
name: Fujii, T.
name: Fuster, A.
name: Galea, C.
name: García, B.
name: Gaudu, C.
name: Gherghel-Lascu, A.
name: Giaccari, U.
name: Glombitza, J.
name: Gobbi, F.
name: Gollan, F.
name: Golup, G.
name: Berisso, M. Gómez
name: Vitale, P. F. Gómez
name: Gongora, J. P.
name: González, J. M.
name: González, N.
name: Góra, D.
name: Gorgi, A.
name: Gottowik, M.
name: Guarino, F.
name: Guedes, G. P.
name: Guido, E.
name: Gülzow, L.
name: Hahn, S.
name: Hamal, P.
name: Hampel, M. R.
name: Hansen, P.
name: Harari, D.
name: Harvey, V. M.
name: Haungs, A.
name: Hebbeker, T.
name: Hojvat, C.
name: Hörandel, J. R.
name: Horvath, P.
name: Hrabovský, M.
name: Huege, T.
name: Insolia, A.
name: Isar, P. G.
name: Janardhana, V.
name: Janecek, P.
name: Jilek, V.
name: Johnsen, J. A.
name: Jurysek, J.
name: Kampert, K. -H.
name: Keilhauer, B.
name: Khakurdikar, A.
name: Covilakam, V. V. Kizakke
name: Klages, H. O.
name: Kleifges, M.
name: Knapp, F.
name: Köhler, J.
name: Krieger, F.
name: Kunka, N.
name: Lago, B. L.
name: Langner, N.
name: de Oliveira, M. A. Leigui
name: Lema-Capeans, Y.
name: Letessier-Selvon, A.
name: Lhenry-Yvon, I.
name: Lopes, L.
name: Lu, L.
name: Luce, Q.
name: Lundquist, J. P.
name: Payeras, A. Machado
name: Majercakova, M.
name: Mandat, D.
name: Manning, B. C.
name: Mantsch, P.
name: Mariani, F. M.
name: Mariazzi, A. G.
name: Mariş, I. C.
name: Marsella, G.
name: Martello, D.
name: Martinelli, S.
name: Bravo, O. Martínez
name: Martins, M. A.
name: Mathes, H. -J.
name: Matthews, J.
name: Matthiae, G.
name: Mayotte, E.
name: Mayotte, S.
name: Mazur, P. O.
name: Medina-Tanco, G.
name: Meinert, J.
name: Melo, D.
name: Menshikov, A.
name: Merx, C.
name: Michal, S.
name: Micheletti, M. I.
name: Miramonti, L.
name: Mollerach, S.
name: Montanet, F.
name: Morejon, L.
name: Mulrey, K.
name: Mussa, R.
name: Namasaka, W. M.
name: Negi, S.
name: Nellen, L.
name: Nguyen, K.
name: Nicora, G.
name: Niechciol, M.
name: Nitz, D.
name: Nosek, D.
name: Novotny, V.
name: Nožka, L.
name: Nucita, A.
name: Núñez, L. A.
name: Oliveira, C.
name: Palatka, M.
name: Pallotta, J.
name: Panja, S.
name: Parente, G.
name: Paulsen, T.
name: Pawlowsky, J.
name: Pech, M.
name: Pękala, J.
name: Pelayo, R.
name: Pelgrims, V.
name: Pereira, L. A. S.
name: Martins, E. E. Pereira
name: Armand, J. Perez
name: Bertolli, C. Pérez
name: Perrone, L.
name: Petrera, S.
name: Petrucci, C.
name: Pierog, T.
name: Pimenta, M.
name: Platino, M.
name: Pont, B.
name: Pothast, M.
name: Shahvar, M. Pourmohammad
name: Privitera, P.
name: Prouza, M.
name: Querchfeld, S.
name: Rautenberg, J.
name: Ravignani, D.
name: Akim, J. V. Reginatto
name: Reininghaus, M.
name: Reuzki, A.
name: Ridky, J.
name: Riehn, F.
name: Risse, M.
name: Rizi, V.
name: de Carvalho, W. Rodrigues
name: Rodriguez, E.
name: Rojo, J. Rodriguez
name: Roncoroni, M. J.
name: Rossoni, S.
name: Roth, M.
name: Roulet, E.
name: Rovero, A. C.
name: Ruehl, P.
name: Saftoiu, A.
name: Saharan, M.
name: Salamida, F.
name: Salazar, H.
name: Salina, G.
name: Gomez, J. D. Sanabria
name: Sánchez, F.
name: Santos, E. M.
name: Santos, E.
name: Sarazin, F.
name: Sarmento, R.
name: Sato, R.
name: Savina, P.
name: Schäfer, C. M.
name: Scherini, V.
name: Schieler, H.
name: Schimassek, M.
name: Schimp, M.
name: Schmidt, D.
name: Scholten, O.
name: Schoorlemmer, H.
name: Schovánek, P.
name: Schröder, F. G.
name: Schulte, J.
name: Schulz, T.
name: Sciutto, S. J.
name: Scornavacche, M.
name: Sedoski, A.
name: Segreto, A.
name: Sehgal, S.
name: Shivashankara, S. U.
name: Sigl, G.
name: Silli, G.
name: Sima, O.
name: Simkova, K.
name: Simon, F.
name: Smau, R.
name: Šmída, R.
name: Sommers, P.
name: Soriano, J. F.
name: Squartini, R.
name: Stadelmaier, M.
name: Stanič, S.
name: Stasielak, J.
name: Stassi, P.
name: Strähnz, S.
name: Straub, M.
name: Suomijärvi, T.
name: Supanitsky, A. D.
name: Svozilikova, Z.
name: Szadkowski, Z.
name: Tairli, F.
name: Tapia, A.
name: Taricco, C.
name: Timmermans, C.
name: Tkachenko, O.
name: Tobiska, P.
name: Peixoto, C. J. Todero
name: Tomé, B.
name: Torrès, Z.
name: Travaini, A.
name: Travnicek, P.
name: Tueros, M.
name: Unger, M.
name: Uzeiroska, R.
name: Vaclavek, L.
name: Vacula, M.
name: Galicia, J. F. Valdés
name: Valore, L.
name: Varela, E.
name: Vašíčková, V.
name: Vásquez-Ramírez, A.
name: Veberič, D.
name: Quispe, I. D. Vergara
name: Verzi, V.
name: Vicha, J.
name: Vink, J.
name: Vorobiov, S.
name: Watanabe, C.
name: Weindl, A.
name: Wiencke, L.
name: Wilczyński, H.
name: Wittkowski, D.
name: Wundheiler, B.
name: Yue, B.
name: Yushkov, A.
name: Zapparrata, O.
name: Zas, E.
name: Zavrtanik, D.
name: Zavrtanik, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The flux of ultra-high energy cosmic rays reaching Earth above the ankle energy (5 EeV) can be described as a mixture of nuclei injected by extragalactic sources with very hard spectra and a low rigidity cutoff. Extragalactic magnetic fields existing between the Earth and the closest sources can affect the observed CR spectrum by reducing the flux of low-rigidity particles reaching Earth. We perform a combined fit of the spectrum and distributions of depth of shower maximum measured with the Pierre Auger Observatory including the effect of this magnetic horizon in the propagation of UHECRs in the intergalactic space. We find that, within a specific range of the various experimental and phenomenological systematics, the magnetic horizon effect can be relevant for turbulent magnetic field strengths in the local neighbourhood of order $B_{\rm rms}\simeq (50-100)\,{\rm nG}\,(20\rm{Mpc}/{d_{\rm s})( 100\,\rm{kpc}/L_{\rm coh}})^{1/2}$, with $d_{\rm s}$ the typical intersource separation and $L_{\rm coh}$ the magnetic field coherence length. When this is the case, the inferred slope of the source spectrum becomes softer and can be closer to the expectations of diffusive shock acceleration, i.e., $\propto E^{-2}$. An additional cosmic-ray population with higher source density and softer spectra, presumably also extragalactic and dominating the cosmic-ray flux at EeV energies, is also required to reproduce the overall spectrum and composition results for all energies down to 0.6~EeV.
description: Matches published version