Energy Spectrum of Ultrahigh-Energy Cosmic Rays across Declinations − 9 0 ° to + 44.8 ° as Measured at the Pierre Auger Observatory

作者：Adila Abdul Halim, P. Abreu, M. Aglietta, I. Allekotte, Kévin Almeida Cheminant, A. Almela, Roberto Aloisio, Jaime Álvarez-Muñiz, Antonio Ambrosone, Juan Ammerman Yebra, G. A. Anastasi, L. Anchordoqui, B. Andrada, Luciana Andrade Dourado, S. Andringa, L. Apollonio, C. Aramo, E. Arnone, Juan Carlos Arteaga Velázquez, P. Assis, G. Ávila, E. Avocone, Alena Bakalová, F. Barbato, Adriel Bartz Mocellin, J. A. Bellido, C. Berat, M. E. Bertaina, Marta Bianciotto, Peter L. Biermann, Virginia Binet, K. Bismark, Teresa Bister, Jonathan Biteau, Jiří Blažek, J. Blümer, M. Boháčová, Denise Boncioli, C. Bonifazi, Luan Bonneau Arbeletche, Nataliia Borodai, J. Brack, P. G. Brichetto Orchera, F. L. Briechle, A. Bueno, S. Buitink, Mario Buscemi, M. Büsken, Anthony Bwembya, K. S. Caballero‐Mora, Sergio Cabana-Freire, Lorenzo Caccianiga, F. Campuzano, Jorge Caraça-Valente, R. Caruso, A. Castellina, Fernando Catalani, G. Cataldi, L. Cazon, M. Cerda, Berenika Čermáková, A. Cermenati, J. A. Chinellato, J. Chudoba, L. Chytka, R. W. Clay, A. C. Cobos Cerutti, R. Colalillo, R. Conceição, Giovanni Consolati, Marcelo Conte, Fabio Convenga, Diego Correia dos Santos, P. J. Costa, C. E. Covault, M. Cristinziani, Carlo Salvattore Cruz Sanchez, S. Dasso, K. Daumiller, B. R. Dawson, R. M. de Almeida, E.-T. de Boone, Beatriz de Errico, J. de Jesús, S. J. de Jong, J. R. T. de Mello Neto, I. De Mitri, J. de Oliveira, Danelise de Oliveira Franco, Francesco Palma, V. de Souza, Emanuele De Vito, A. Del Popolo, Olivier Deligny, N. Denner, L. Deval, Armando di Matteo, C. Dobrigkeit, Juan Carlos D’Olivo, Luis Miguel Domingues Mendes, Q. Dorosti, J. C. dos Anjos, R. C. dos Anjos, Jan Ebr, Fiona H. Ellwanger, R. Engel, I. Epicoco, M. Erdmann, A. Etchegoyen, Carmelo Evoli, H. Falcke, G. Farrar, A. C. Fauth, Tim Fehler, F. Feldbusch, A. Fernandes, Marcos Fernández, B. Fick, J. M. Figueira, P. Filip, A. Filipčič, T. Fitoussi, Benjamin Flaggs, Tomáš Fodran, Antonio Franco, M. Freitas, Toshihiro Fujii, A. Fuster, C. Galea, B. Garćıa, Chloé Gaudu, P. L. Ghia, U. Giaccari, Fabian Gobbi, Fernando Gollan, G. Golup, M. Gómez Berisso, P. F. Gómez Vitale, J. P. Gongora, Juan Manuel González, Nicolás Martín González, D. Góra, A. Gorgi, M. Gottowik, F. Guarino, G. P. Guedes, E. Guido, Lukas Gülzow, Steffen Hahn, P. Hamal, Matías Rolf Hampel, P. H. Hansen, Violet M. Harvey, A. Haungs, T. Hebbeker, C. Hojvat, J.R. Hörandel, Pavel Horváth, Miroslav Hrabovský, T. Huege, A. Insolia, Paula Gina Isar, Mohamed Ismaiel, P. Janecek, Vlastimil Jílek, K.‐H. Kampert, B. Keilhauer, A. Khakurdikar, Varada Varma Kizakke Covilakam, H. O. Klages, M. Kleifges, Jan Köhler, F. Krieger, Margita Kubátová, N. Kunka, Bruno L. Lago, Niklas Langner, Nicolas Leal, M. A. Leigui de Oliveira, Yago Lema-Capeans, A. Letessier‐Selvon, I. Lhenry-Yvon, L. Lopes, Jon Paul Lundquist, M. Mallamaci, Dušan Mandát, P. Mantsch, F. M. Mariani, A. G. Mariazzi, Ioana Codrina Mariş, G. Marsella, D. Martello, S. Martinelli, Miguel A. Martins, Hermann-Josef Mathes, J. Matthews, G. Matthiae, Eric William Mayotte, S. Mayotte, P. O. Mazur, G. Medina-Tanco, Jill Meinert, D. Melo, A. Menshikov, Carmen Merx, S. Michal, M. I. Micheletti, L. Miramonti, Megha Mogarkar, S. Mollerach, F. Montanet, Leonel Morejón, Katharine Mulrey, R. Mussa, W. M. Namasaka, S. Negi, L. Nellen, K. Nguyen, Gabriela Nicora, Marcus Niechciol, D. Nitz, Dalibor Nosek, A. Novikov, Vladimír Novotný, L. Nožka, Achille Nucita, Luis A. Núñez, José Ochoa, C. Oliveira, L. Östman, M. Palatka, J. Pallotta, Subhash Chandra Panja, G. Parente, T. Paulsen, J. Pawlowsky, M. Pech, Jan Pękala, R. Pelayo, Vincent Pelgrims, Luiz Augusto Pereira, E. E. Pereira Martins, C. Pérez Bertolli, L. Perrone, S. Petrera, C. Petrucci, T. Pierog, M. Pimenta, M. Platino, Bjarni Pont, Mohsen Pourmohammad Shahvar, P. Privitera, C. Priyadarshi, M. Prouza, K. Pytel, S. Querchfeld, J. Rautenberg, D. Ravignani, João Vítor Reginatto Akim, Alex Reuzki, J. Řídký, Felix Riehn, Markus Risse, V. Rizi, E. Rodrı́guez, Gonzalo Rodriguez Fernandez, Juan Rojo, Simone Rossoni, M. Roth, E. Roulet, A.C. Rovero, A. Sǎftoiu, M. Saharan, F. Salamida, H. Salazar, G. Salina, P. Sampathkumar, Nicolas San Martin, Jose Sanabria Gomez, F. Sánchez, Eva Santos, Edivaldo Moura Santos, F. Sarazin, R. Sarmento, R. Sato, P. Savina, Viviana Scherini, H. Schieler, Martin Schimassek, M. Schimp, David Schmidt, O. Schölten, H. Schoorlemmer, Petr Schovánek, Frank Schröder, J. Schulte, T. Schulz, S. J. Sciutto, Marina Scornavacche, Adrian Sedoski, A. Segreto, S. Sehgal, S. U. Shivashankara, G. Sigl, Katarína Simkova, F. Simon, Radomir Šmída, P. Sommers, R. Squartini, Maximilian Stadelmaier, S. Stanič, Jarosław Stasielak, Patrick Stassi, S. Strähnz, M. Straub, T. Suomijärvi, A. D. Supanitsky, Zuzana Svozilikova, Karolina Syrokvas, Zbigniew Szadkowski, Fedor Tairli, Matteo Tambone, A. Tapia, C. Taricco, C. Timmermans, Olena Tkachenko, P. Tobiska, Carlos J. Todero Peixoto, B. Tomé, Andres Travaini, P. Trávnı́ček, Matias Jorge Tueros, M. Unger, Rukije Uzeiroska, Lukáš Vaclavek, Martin Vacula, Igor Vaiman, Jose F. Valdés Galicia, Laura Valore, Pim van Dillen, Enrique Varela, V. Vašíčková, A. Vásquez-Ramírez, Darko Veberič, I. D. Vergara Quispe, Stef Verpoest, V. Verzi, J. Vícha, Jacco Vink, S. Vorobiov, J. B. Vuta, C. Watanabe, A. A. Watson, A. Weindl, Melanie Weitz, L. Wiencke, H. Wilczyński, B. Wundheiler, Bin Yue, Alexey Yushkov, E. Zas, D. Zavrtanik, M. Zavrtanik · 发表于：Physical Review Letters · 年份：2025 · DOI：10.1103/p4l5-hxlf · 被引用次数：4 · 研究领域：Astrophysics and Cosmic Phenomena、Dark Matter and Cosmic Phenomena、Solar and Space Plasma Dynamics

The energy spectrum of cosmic rays above 2.5 EeV has been measured across the declination range -90°≤δ≤+44.8° using ∼310 000 events accrued at the Pierre Auger Observatory from an exposure of (104 900±3 100) km^{2} sr yr. No significant variations of energy spectra with declination are observed, after allowing or not for nonuniformities across the sky arising from the well-established dipolar anisotropies in the arrival directions of ultrahigh-energy cosmic rays. The instep feature in the spectrum at ≃10 EeV reported previously is now established at a significance above 5σ. Within the statistics, the energy spectra are indistinguishable across declinations so disfavoring an origin for the instep from a few distinctive sources.