Accès ouvert déclaré
2022
preprint
Constraining the sources of ultra-high-energy cosmic rays across and above the ankle with the spectrum and composition data measured at the Pierre Auger Observatory
Adila Abdul Halim, P. Abreu, M. Aglietta, I. Allekotte, Jaime Álvarez-Muñiz, Juan Ammerman Yebra, G. A. Anastasi, L. Anchordoqui, S. Andringa, C. Aramo, P. M. Ferreira, E. Arnone, P. Assis, G. Avila, Emanuele Avocone, Alina Mihaela Badescu, Alena Bakalová, A. Balaceanu, C. Berat, Gopal Bhatta, P. L. Biermann, Teresa Bister, J. Biteau, C. Bleve, M. Boháčová, Denise Boncioli, C. Bonifazi, Luan Bonneau Arbeletche, J. Brack, T. Bretz, F. L. Briechle, A. Bueno, S. Buitink, Mario Buscemi, M. Büsken, Anthony Bwembya, K. S. Caballero‐Mora, Lorenzo Caccianiga, I. Caracas, R. Caruso, A. Castellina, F. Catalani, L. Cazon, M. Cerda, J. A. Chinellato, J. Chudoba, L. Chytka, Agustín Cobos Cerutti, Roberta Colalillo, A. Coleman, M. R. Coluccia, R. Conceição, M. Conte, Fabio Convenga, Diego Correia dos Santos, Carlo Salvattore Cruz Sanchez, S. Dasso, K. Daumiller, B. R. Dawson, S. J. de Jong, I. De Mitri, D. Franco, Emanuele De Vito, Armando di Matteo, M. Dobre, C. Dobrigkeit, Luis Miguel Domingues Mendes, R. C. dos Anjos, J. Ebr, R. Engel, M. Erdmann, A. Etchegoyen, H. Falcke, J. Farmer, G. Farrar, A. C. Fauth, N. Fazzini, F. Feldbusch, F. Fenu, B. Fick, J.M Figueira, T. Fitoussi, Benjamin Flaggs, T. Fujii, C. Galea, B. Garćıa, H. Gemmeke, A. Gherghel‐Lascu, P. L. Ghia, U. Giaccari, Jonas Glombitza, F. Gobbi, F. Gollan, G. Golup, M. Gómez Berisso, Primo F. Gómez Vitale, J. M. González, Nicolás Martín González, D. Góra, A. Gorgi, M. Gottowik, F. Guarino, Eleonora Guido, S. Hahn, P. Hamal, Matías Rolf Hampel, P. Hansen, D. Harari, V. M. Harvey, A. Haungs, T. Hebbeker, D. Heck, C. Hojvat, M. Hrabovský, T. Huege, A. Insolia, Paula Gina Isar, P. Janecek, Jakub Jurýšek, A. Kääpä, B. Keilhauer, Abha Khakurdikar, Varada Varma Kizakke Covilakam, H. O. Klages, M. Kleifges, N. Kunka, Bruno L. Lago, M. A. Leigui de Oliveira, V. Lenok, A. Letessier‐Selvon, D. Lo Presti, L. Lopes, R. López, L. Lu, Q. Luce, Jon Paul Lundquist, M. Majercakova, B. C. Manning, J. Manshanden, P. Mantsch, F. M. Mariani, A. G. Mariazzi, D. Martello, S. Martinelli, O. Martı́nez, Massimo Mastrodicasa, J. Matthews, G. Matthiae, Eric William Mayotte, P. O. Mazur, J. Meinert, D. Melo, A. Menshikov, S. Michal, Michele Micheletti, L. Miramonti, S. Mollerach, Leonel Morejón, Ana L. Müller, K. Mulrey, R. Mussa, A. Nasr-Esfahani, Marcus Niechciol, D. Nitz, D. Nosek, Vladimír Novotný, L. Nožka, Luis A. Núñez, M. Palatka, G. Parente, A. Parra, M. Pech, Jan Pękala, R. Pelayo, Edyvânia Emily Pereira Martins, Johnnier Perez Armand, Carmina Pérez Bertolli, S. Petrera, C. Petrucci, T. Pierog, M. Pimenta, M. Platino, B. Pont, M. Pothast, Paolo Privitera, Andrew Puyleart, M. Reininghaus, J. Ridky, F. Riehn, M. Risse, V. Rizi, W. Rodrigues de Carvalho, Juan Rojo, M. Roth, E. Roulet, A. C. Rovero, M. Saharan, H. Salazar, Jose Sanabria Gomez, F. Sánchez, E. M. Santos, R. Sato, Viviana Scherini, H. Schieler, Martin Schimassek, Felix Schlüter, D. Schmidt, Harm Schoorlemmer, J. Schulte, S. J. Sciutto, M. Scornavacche, A. Segreto, S. U. Shivashankara, G. Sigl, G. Silli, O. Sima, P. Sommers, Maximilian Stadelmaier, D. Stanca, S. Stanič, Jarosław Stasielak, P. Stassi, Mauricio Suárez‐Durán, A. D. Supanitsky, Zbigniew Szadkowski, A. Tapia, C. Taricco, C. Timmermans, O. Tkachenko, Z. Torrès, P. Trávnı́ček, C Trimarelli, R. Ulrich, M. Unger, Lukáš Vaclavek, Martin Vacula, Jose F. Valdés Galicia, Enrique Varela, A Vásquez-Ramírez, Darko Veberič, Cynthia Ventura, V. Verzi, J. Vicha, S. Vorobiov, C. Watanabe, A. A. Watson, A. Weindl, L. Wiencke, H. Wilczyński, D. Wittkowski, B. Wundheiler, A. Yushkov, Orazio Zapparrata, E. Zas, D. Zavrtanik, M. Zavrtanik
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Résumé fourni par la source
In this work we present the interpretation of the energy spectrum and mass composition data as measured by the Pierre Auger Collaboration above $6 \times 10^{17}$ eV. We use an astrophysical model with two extragalactic source populations to model the hardening of the cosmic-ray flux at around $5\times 10^{18}$ eV (the so-called "ankle" feature) as a transition between these two components. We find our data to be well reproduced if sources above the ankle emit a mixed composition with a hard spectrum and a low rigidity cutoff. The component below the ankle is required to have a very soft spectrum and a mix of protons and intermediate-mass nuclei. The origin of this intermediate-mass component is not well constrained and it could originate from either Galactic or extragalactic sources. To the aim of evaluating our capability to constrain astrophysical models, we discuss the impact on the fit results of the main experimental systematic uncertainties and of the assumptions about quantities affecting the air shower development as well as the propagation and redshift distribution of injected ultra-high-energy cosmic rays (UHECRs).
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Sujets associés
Astrophysics and Cosmic PhenomenaInsects and Parasite InteractionsDark Matter and Cosmic Phenomena