| Title: |
Combined fit above 0.1 EeV to the cosmic-ray spectrum and composition measured with the Pierre Auger Observatory |
| Authors: |
Pierre Auger Collaboration; Abdul Halim, Adila; Abreu, Pedro; Aglietta, Marco; Allekotte, Ingomar; Almeida Cheminant, Kevin; Almela, Alejandro; Aloisio, Roberto; Alvarez-Muñiz, Jaime; Ambrosone, Antonio; Ammerman Yebra, Juan; Anastasi, Gioacchino Alex; Anchordoqui, Luis A.; Andrada, Belén; Andrade Dourado, Luciana; Andringa, Sofia; Apollonio, Lorenzo; Aramo, Carla; Arnone, Enrico; Arteaga Velazquez, Juan Carlos; Assis, Pedro; Avila, Gualberto; Avocone, Emanuele; Bakalova, Alena; Barbato, Felicia; Bartz Mocellin, Adriel; Bellido, Jose A.; Berat, Corinne; Bertaina, Mario E.; Bianciotto, Marta; Biermann, Peter L.; Binet, Virginia; Bismark, Kathrin; Bister, Teresa; Biteau, Jonathan; Blazek, Jiri; Blümer, Johannes; Bohacova, Martina; Boncioli, Denise; Bonifazi, Carla; Bonneau Arbeletche, Luan; Borodai, Nataliia; Brack, Jeffrey; Brichetto Orchera, P. Gabriel; Briechle, Florian Lukas; Bueno, Antonio; Buitink, Stijn; Buscemi, Mario; Büsken, Max; Bwembya, Anthony; Caballero-Mora, Karen S.; Cabana-Freire, Sergio; Caccianiga, Lorenzo; Campuzano, Federico; Caraça-Valente, Jorge; Caruso, Rossella; Castellina, Antonella; Catalani, Fernando; Cataldi, Gabriella; Cazon, Lorenzo; Cerda, Marcos; Čermáková, Berenika; Cermenati, Alessandro; Chinellato, Jose Augusto; Chudoba, Jiří; Chytka, Ladislav; Clay, Roger W.; Cobos Cerutti, Agustín; Colalillo, Roberta; Conceição, Rúben; Consolati, Giovanni; Conte, Matteo; Convenga, Fabio; Correia dos Santos, Diego; Costa, Pedro J.; Covault, Corbin; Cristinziani, Markus; Cruz Sanchez, Carlo Salvattore; Dasso, Sergio; Daumiller, Kai; Dawson, Bruce R.; de Almeida, Rogerio M.; de Boone, Eric-Teunis; de Errico, Beatriz; de Jesús, Joaquín; de Jong, Sijbrand J.; de Mello Neto, João; De Mitri, Ivan; de Oliveira, Jaime; de Oliveira Franco, Danelise; de Palma, Francesco; de Souza, Vitor; De Vito, Emanuele; Del Popolo, Antonino; Deligny, Olivier; Denner, Nikolas; Deval, Luca; di Matteo, Armando; Dobrigkeit, Carola; D'Olivo, Juan Carlos; Domingues Mendes, Luis Miguel; Dorosti, Qader; dos Anjos, Joao; dos Anjos, Rita Cassia; Ebr, Jan; Ellwanger, Fiona H.; Engel, Ralph; Epicoco, Italo; Erdmann, Martin; Etchegoyen, Alberto; Evoli, Carmelo; Falcke, Heino; Farrar, Glennys R.; Fauth, Anderson; Fehler, Tim; Feldbusch, Fridtjof; Fernandes, Alexandra; Fernandez, Mateo; Fick, Brian; Figueira, Juan Manuel; Filip, Paul; Filipcic, Andrej; Fitoussi, Thomas; Flaggs, Benjamin; Fodran, Tomáš; Franco, Antonio; Freitas, Milton; Fujii, Toshihiro; Fuster, Alan; Galea, Cristina; Garcia, Beatriz; Gaudu, Chloé; Ghia, Piera Luisa; GIACCARI, Ugo; Gobbi, Fabian; Gollan, Fernando; Golup, Geraldina; Gómez Berisso, Mariano; Gómez Vitale, Primo F.; Gongora, Juan Pablo; Gonzalez, Juan Manuel; Gonzalez, Nicolas Martin; Gora, Dariusz; Gorgi, Alessio; Gottowik, Marvin; Guarino, Fausto; Guedes, Germano; Gülzow, Lukas; Hahn, Steffen; Hamal, Petr; Hampel, Matías Rolf; Hansen, Patricia María; Harvey, Violet M.; Haungs, Andreas; Hebbeker, Thomas; Hojvat, Carlos; Hörandel, Jörg; Horvath, Pavel; Hrabovsky, Miroslav; Huege, Tim; Insolia, Antonio; Isar, Paula Gina; Ismaiel, Mohamed; Janecek, Petr; Jilek, Vlastimil; Kampert, Karl-Heinz; Keilhauer, Bianca; Khakurdikar, Abha; Kizakke Covilakam, Varada Varma; Klages, Hans; Kleifges, Matthias; Köhler, Jelena; Krieger, Frederik; Kubatova, Margita; Kunka, Norbert; Lago, Bruno L.; Langner, Niklas; Leal, Nicolas; Leigui de Oliveira, Marcelo Augusto; Lema-Capeans, Yago; Letessier-Selvon, Antoine; Lhenry-Yvon, Isabelle; LOPES, Luis; Lundquist, Jon Paul; Mallamaci, Manuela; Mandat, Dusan; Mantsch, Paul; Mariani, Federico Maria; Mariazzi, Analisa; Maris, Ioana Codrina; Marsella, Giovanni; Martello, Daniele; Martinelli, Sara; Martins, Miguel A.; Mathes, Hermann-Josef; Matthews, James; Matthiae, Giorgio; Mayotte, Eric William; Mayotte, Sonja; Mazur, Peter; Medina-Tanco, Gustavo; Meinert, Janning; Melo, Diego; Menshikov, Alexander; Merx, Carmen; Michal, Stanislav; Micheletti, Maria Isabel; Miramonti, Lino; Mogarkar, Megha; Mollerach, Silvia; Montanet, François; Morejon, Leonel; Mulrey, Katharine; Mussa, Roberto; Namasaka, Wilson M.; Negi, Shefali; Nellen, Lukas; Nguyen, Khoa; Nicora, Gabriela; Niechciol, Marcus; Nitz, Dave; Nosek, Dalibor; Novikov, Alexander; Novotný, Vladimír; Nozka, Libor; Nucita, Achille; Nunez, Luis A.; Ochoa, José; Oliveira, Cainã; Östman, Leo; Palatka, Miroslav; Pallotta, Juan; Panja, Shayoni; Parente, Gonzalo; Paulsen, Therese; Pawlowsky, Jannis; Pech, Miroslav; Pękala, Jan; Pelayo, Rodrigo; Pelgrims, Vincent; Pereira, Luiz Augusto; Pereira Martins, Edyvania Emily; Pérez Bertolli, Carmina; Perrone, Lorenzo; Petrera, Sergio; Petrucci, Camilla; Pierog, Tanguy; Pimenta, Mário; Platino, Manuel; Pont, Bjarni; Pourmohammad Shahvar, Mohsen; Privitera, Paolo; Priyadarshi, Chaitanya; Prouza, Michael; Pytel, Krzysztof; Querchfeld, Sven; Rautenberg, Julian; Ravignani, Diego; Reginatto Akim, João Vitor; Reuzki, Alex; Ridky, Jan; Riehn, Felix; Risse, Markus; Rizi, Vincenzo; Rodriguez, Ezequiel; Rodriguez Fernandez, Gonzalo; Rodriguez Rojo, Jorge Rubén; Rossoni, Simone; Roth, Markus; Roulet, Esteban; Rovero, Adrian; Saftoiu, Alexandra; Saharan, Mohit; Salamida, Francesco; Salazar, Humberto Ibarguen; Salina, Gaetano; Sampathkumar, Pranav; San Martin, Nicolas; Sanabria Gomez, Jose; Sánchez, Federico Andrés; Santos, Edivaldo Moura; Santos, Eva; Sarazin, Fred; Sarmento, Raul; Sato, Ricardo; Savina, Pierpaolo; Scherini, Viviana; Schieler, Harald; Schimassek, Martin; Schimp, Michael; Schmidt, David; Scholten, Olaf; Schoorlemmer, Harm; Schovanek, Petr; Schröder, Frank G.; Schulte, Josina; Schulz, Tobias; Sciutto, Sergio J.; Scornavacche, Marina; Sedoski, Adrian; Segreto, Alberto; Sehgal, Srijan; Shivashankara, Shima Ujjani; Sigl, Guenter; Simkova, Katarína; Simon, Frank; Smida, Radomir; Sommers, Paul; Squartini, Ruben; Stadelmaier, Maximilian; Stanič, Samo; Stasielak, Jaroslaw; Stassi, Patrick; Strähnz, Simon; Straub, Maximilian; Suomijarvi, Tiina; Supanitsky, A. Daniel; Svozilikova, Zuzana; Syrokvas, Karolina; Szadkowski, Zbigniew; Tairli, Fedor; Tambone, Matteo; Tapia, Alex; Taricco, Carla; Timmermans, Charles; Tkachenko, Olena; Tobiska, Petr; Todero Peixoto, Carlos J.; Tomé, Bernardo; Travaini, Andres; Travnicek, Petr; Tueros, Matias Jorge; Unger, Michael; Uzeiroska, Rukije; Vaclavek, Lukáš; Vacula, Martin; Vaiman, Igor; Valdés Galicia, Jose F.; Valore, Laura; van Dillen, Pim; Varela, Enrique; Vašíčková, Veronika; Vásquez-Ramírez, Adriana; Veberic, Darko; Vergara Quispe, Indira D.; Verpoest, Stef; Verzi, Valerio; Vicha, Jakub; Vink, Jacco; Vorobiov, Serguei; Vuta, Jhansi Bhavani; Watanabe, Clara Keiko Oliveira; Watson, Alan; Weindl, Andreas; Weitz, Melanie; Wiencke, Lawrence; Wilczyński, Henryk; Wundheiler, Brian; Yue, Baobiao; Yushkov, Alexey; Zas, Enrique; Zavrtanik, Danilo; Zavrtanik, Marko |
| Source: |
ISSN: 1824-8039. |
| Publisher Information: |
Scuola Internazionale Superiore di Studi Avanzati |
| Publication Year: |
2025 |
| Collection: |
KITopen (Karlsruhe Institute of Technologie) |
| Subject Terms: |
ddc:530; Physics; info:eu-repo/classification/ddc/530 |
| Description: |
We fit the cosmic-ray spectrum measured with the Pierre Auger Observatory's surface detectors above an energy of 10$^{17}$ eV, along with composition information inferred from the depth of shower maximum measured with its fluorescence detectors above an energy threshold of 10$^{17.8}$ eV. We consider astrophysical scenarios with two distinct extragalactic source populations: one dominating the flux above a few EeV, and the other dominating at lower energies, with representative nuclei being injected at the sources with power-law spectra and rigidity-dependent cutoffs. The high-energy population exhibits a hard source injection spectrum and a relatively heavy composition, while the low-energy population exhibits a softer spectrum and a lighter composition. Extending the fit down to the low energies considered here shows the potential to test the energy region towards the Galactic to extragalactic transition with the data of the Pierre Auger Observatory. In particular, the Galactic contribution is expected to be still sizable at the lowest energies considered, and the extragalactic contribution needs to become suppressed for decreasing energies, an effect that could naturally result from a magnetic-horizon-induced suppression. |
| Document Type: |
article in journal/newspaper; conference object |
| File Description: |
application/pdf |
| Language: |
English |
| ISSN: |
1824-8039 |
| Relation: |
Proceedings of Science (PoC); info:eu-repo/semantics/altIdentifier/issn/1824-8039; https://publikationen.bibliothek.kit.edu/1000190566; https://publikationen.bibliothek.kit.edu/1000190566/174892683; https://doi.org/10.5445/IR/1000190566 |
| DOI: |
10.5445/IR/1000190566 |
| Availability: |
https://publikationen.bibliothek.kit.edu/1000190566; https://publikationen.bibliothek.kit.edu/1000190566/174892683; https://doi.org/10.5445/IR/1000190566 |
| Rights: |
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.de ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.F9CF09AD |
| Database: |
BASE |