Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory

  title={Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory},
  author={The Pierre Auger Collaboration Alexander Aab and Pedro Abreu and Marco Aglietta and Imen Al Samarai and Ivone F. M. Albuquerque and Ingomar Allekotte and Alejandro Almela and Jesus Alvarez Castillo and Jaime Alvarez-Mu{\~n}iz and Gioacchino Alex Anastasi and Luis A. Anchordoqui and Bel{\'e}n Andrada and Sofia Andringa and Carla Aramo and F. Arqueros and Nicusor Arsene and Hern{\'a}n Asorey and P. Assis and Julien Aublin and Gualberto Avila and Alina M. Badescu and Alexandru Balaceanu and R. Luz and James J. Beatty and Kathrin Becker and J Almirall Bellido and Corinne B{\'e}rat and Mario Edoardo Bertaina and Xavier Bertou and Peter L. Biermann and P. Billoir and Jonathan Biteau and Simon G Blaess and Alberto Blanco and Jonathan A. Blazek and Carla Bleve and Martina Boh'avcov'a and Denise Boncioli and C. Bonifazi and Nataliia Borodai and Ana Botti and Jeffrey Brack and I. Brancus and Thomas Bretz and Ariel M. Bridgeman and Florian Lukas Briechle and Peter Buchholz and A. Bueno and Stijn Buitink and Mario Buscemi and Karen S. Caballero-Mora and Lorenzo Caccianiga and Angel Cancio and Fabrizia Canfora and Laurenţiu I. Caramete and Rossella Caruso and Antonella Castellina and Gabriella Cataldi and Lorenzo Cazon and Alan G Chavez and Jose Augusto Chinellato and Jiri Chudoba and Roger Clay and Roberta Colalillo and A. Coleman and Laura Collica and M. R. Coluccia and Ruben Conceiccao and Fernando Contreras and Mathew J Cooper and St{\'e}phane Coutu and Corbin Edward Covault and James W. Cronin and Stefano D'Amico and Bruno Daniel and Sergio Dasso and Kai Daumiller and Bruce R. Dawson and Rog{\'e}rio M. de Almeida and Sijbrand J. de Jong and Giuseppe De Mauro and Jo{\~a}o de Mello Neto and Ivan De Mitri and Jos{\'e} de Oliveira and Vitor de Souza and J. Debatin and Olivier Deligny and Claudio Di Giulio and A. di Matteo and Mary Lucia D'iaz Castro and Francisco Diogo and Carola Dobrigkeit and Juan Carlos D'Olivo and Qaran Dorosti and Rita C. dos Anjos and M. T. Dova and Andrej Dundovi{\'c} and Jan Ebr and Ralph Engel and Martin Erdmann and Mona Erfani and Carlos Ourivio Escobar and Joao Canhoto Espadanal and Alberto Etchegoyen and Heino Falcke and Glennys R. Farrar and Anderson Campos Fauth and Norberto Fazzini and Brian E. Fick and Juan Manuel Figueira and Andrej Filipvcivc and Octavian Fratu and Mart'in Miguel Freire and T. Fujii and Alan Fuster and Romain Gaior and Beatriz Garc'ia and Diego Garc{\'i}a-Pinto and Florian Gat'e and Hartmut Gemmeke and Alexandru Gherghel-Lascu and Piera Luisa Ghia and Ugo Gregorio Giaccari and Marco Giammarchi and Maria Giller and Dariusz Glas and Christian Glaser and Geraldina Golup and Mariano G'omez Berisso and Primo F G'omez Vitale and Nicol'as Gonz'alez and Alessio Gorgi and P. W. Gorham and Aurelio F. Grillo and Trent D. Grubb and Fausto Guarino and Germano P. Guedes and Mat'ias Rolf Hampel and Patricia Hansen and Diego D. Harari and Thomas A Harrison and John L. Harton and Andreas Haungs and Thomas Hebbeker and D. Heck and Philip A. Heimann and Alexander E. Herv{\'e} and Gary C. Hill and Carlos Hojvat and Ewa M. Holt and Piotr Homola and Jorg R. Horandel and P{\'e}ter Horv{\'a}th and Miroslav Hrabovsk'y and T. Huege and Johannes Hulsman and Antonio Insolia and Paula Gina Isar and Ingolf Jandt and Stefan Jansen and Jeffrey A. Johnsen and Mariela Josebachuili and Alex Kaapa and Olga Kambeitz and K-H. Kampert and Igor I Katkov and Bianca Keilhauer and Ernesto Kemp and Julian Kemp and Roger M. Kieckhafer and H. Klages and M. Kleifges and Jonny Kleinfeller and Raphael Krause and Nicole Krohm and Daniel Kuempel and Ga{\vs}per Kukec Mezek and Norbert Kunka and A. W. Kuotb Awad and Danielle LaHurd and Markus Lauscher and Remigiusz Legumina and M. Leigui de Oliveira and Antoine Letessier-Selvon and Isabelle Lhenry-Yvon and Katrin Link and L. Lopes and R. J. Garc'ia L'opez and Aida L'opez Casado and Quentin Luce and Agustin Lucero and Max Malacari and M. Mallamaci and Du{\vs}an Mand{\'a}t and Paul Mantsch and Analisa G. Mariazzi and Ioana Marics and Giovanni Marsella and Daniele Martello and H. Martinez and Oscar Mart'inez Bravo and Jimmy Mas'ias Meza and H. J. Mathes and Sebastian Mathys and James Matthews and J. A. Matthews and Giorgio Matthiae and Eric Mayotte and Peter Mazur and Carlos Medina and Gustavo A. Medina-Tanco and Diego G. Melo and Alexander Menshikov and M. I. Micheletti and Lukas Middendorf and Ignacio A. Minaya and Lino Miramonti and Bogdan Mitrica and Daniela Mockler and Silvia Mollerach and Franccois Montanet and Carlo Morello and Miguel Mostaf'a and A. L. Muller and Gero Muller and Marcio Aparecido Muller and Sarah Muller and R. Mussa and Ivo Nicolas Naranjo and Lukas Nellen and Phong Hoai Nguyen and Mihai Niculescu-Oglinzanu and Marcus Niechciol and Lukas Niemietz and Tim Niggemann and Dave F. Nitz and Dalibor Nosek and Vladimir Novotny and H. Novzka and Luis A. N'unez and Livingstone Ochilo and Foteini Oikonomou and Angela V. Olinto and Miroslav Palatka and Juan Vicente Pallotta and Philipp Papenbreer and Gonzalo Parente and Alejandra Parra and Thomas Cantzon Paul and Miroslav Pech and Francisco Pedreira and Jan Pkekala and Rodrigo Pelayo and J. Pe{\~n}a-Rodr{\'i}guez and L. A. S. Pereira and M. Perl'in and Lorenzo M Perrone and Christine Peters and Sergio Petrera and Jamyang Phuntsok and Ricardo Piegaia and Tanguy Pierog and Pablo Pieroni and M. Pimenta and Valerio Pirronello and Manuel Platino and M. Plum and C. Porowski and R. R. Prado and P. Privitera and Michael Prouza and Eduardo Quel and Sven Querchfeld and Sean Quinn and Ra{\'u}l Ramos-Poll{\'a}n and Julian Rautenberg and Diego Ravignani and Beno{\^i}t Revenu and Jan Ř{\'i}dk{\'y} and Markus Risse and Pablo Ristori and Vincenzo Rizi and W. Rodrigues de Carvalho and Gonzalo Rodriguez Fernandez and Jorge Rub'en Rodriguez Rojo and Dmytro Rogozin and Mat{\'i}as J. Roncoroni and Markus Roth and Esteban Roulet and A. Clay R.W. Rovero and Philip Ruehl and Steven J. Saffi and A. Saftoiu and Francesco Salamida and Humberto Ibarguen Salazar and Ahmed Saleh and Francisco Salesa Greus and Gaetano Salina and Federico S'anchez and Patricia Sanchez-Lucas and Edivaldo Moura Santos and Elton J. G. Santos and F. Sarazin and Ra{\'u}l Sarmento and C. A. Sarmiento and Ricardo Sato and Markus Schauer and Viviana Scherini and Harald Schieler and Michael Schimp and David Schmidt and Olaf Scholten and Petr Schov'anek and Frank G. Schroder and Alex Schulz and Johannes Schulz and Johannes Schumacher and Sergio J. Sciutto and Alberto Segreto and Mariangela Settimo and Amir Hosein Shadkam and Ronald Cintra Shellard and Guenter Sigl and Gaia Silli and Octavian Sima and Andrzej Śmiałkowski and Radom'ir vSm'ida and Gregory R. Snow and Paul Sommers and Sebastian Sonntag and J. Sorokin and Ruben Squartini and D. Stanca and Samo Stanivc and Jaroslaw Stasielak and Patrick Stassi and F. Strafella and Federico Suarez and M. Suarez Dur'an and Tristan Sudholz and Tiina Suomijarvi and Alberto Daniel Supanitsky and John Swain and Zbigniew Szadkowski and Alfonso G. Taboada and Oscar Alejandro Taborda and Alex Tapia and Vanessa Menezes Theodoro and C. Timmermans and Carlos Jos{\'e} Todero Peixoto and L. Tomankova and Bernardo Tom'e and Guillermo Torralba Elipe and Petr Tr{\'a}vn{\'i}{\vc}ek and Marta Trini and Ralf Ulrich and Michael Unger and Martin Urban and Jose F. Vald{\'e}s Galicia and In{\'e}s Vali{\~n}o and Laura Valore and Guus van Aar and Patrick van Bodegom and A. M. Berg and Arjen van Vliet and Enrique Varela and Bernardo Vargas C'ardenas and G. S. Varner and J. J. Rodr'iguez V'azquez and Ricardo V'azquez and Darko Veberivc and Indira D. Vergara Quispe and Valerio Verzi and Jakub V{\'i}cha and L. Villase{\~n}or and Serguei Vorobiov and Hernan Wahlberg and Oscar Wainberg and D. Walz and Alan Andrew Watson and M. Weber and Andreas Weindl and Lawrence Richard Wiencke and Henryk Wilczy'nski and Tobias Winchen and Marcus Wirtz and David Wittkowski and Brian Wundheiler and L. Yang and Diana Yel{\'o}s and A. Yushkov and Enrique Zas and Danilo Zavrtanik and Marko Zavrtanik and A. Zepeda and Benedikt Zimmermann and Michael S. Ziolkowski and Zizhao Zong and Francesca Zuccarello},
  journal={Journal of Cosmology and Astroparticle Physics},
  pages={038 - 038}
We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit has been performed for energies above 5 ⋅ 1018 eV, i.e. the region of the all-particle spectrum above the so-called “ankle” feature. The astrophysical model we adopted consists of identical sources uniformly distributed in a comoving volume, where nuclei are accelerated through a rigidity-dependent mechanism. The fit… 

Telescope Array Combined Fit to Cosmic Ray Spectrum and Composition

  • D. Bergman
  • Physics
    Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)
  • 2021
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The need for a local source of UHE CR nuclei

Recent results of the Pierre Auger (Auger) fluorescence detectors indicate an increasingly heavy composition of ultra-high energy (UHE) cosmic rays (CRs). Assuming that this trend continues up to the

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