Open Questions in Cosmic-Ray Research at Ultrahigh Energies

Rafael Alves Batista; Jonathan Biteau; Mauricio Bustamante; Klaus Dolag; Ralph Engel; Ke Fang; Karl Heinz Kampert; Dmitriy Kostunin; Miguel Mostafa; Kohta Murase; Foteini Oikonomou; Angela V. Olinto; Mikhail I. Panasyuk; Guenter Sigl; Andrew M. Taylor; Michael Unger

doi:10.3389/fspas.2019.00023

Open Questions in Cosmic-Ray Research at Ultrahigh Energies

Rafael Alves Batista, Jonathan Biteau, Mauricio Bustamante, Klaus Dolag, Ralph Engel, Ke Fang, Karl Heinz Kampert, Dmitriy Kostunin, Miguel Mostafa, Kohta Murase, Foteini Oikonomou, Angela V. Olinto, Mikhail I. Panasyuk, Guenter Sigl, Andrew M. Taylor, Michael Unger

Research output: Contribution to journal › Review article

14 Scopus citations

Abstract

We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP workshop in 2018. Specifically, we overview open questions on the origin of the bulk of UHECRs, the UHECR mass composition, the origin of the end of the cosmic-ray spectrum, the transition from Galactic to extragalactic cosmic rays, the effect of magnetic fields on the trajectories of UHECRs, anisotropy expectations for specific astrophysical scenarios, hadronic interactions, and prospects for discovering neutral particles as well as new physics at ultrahigh energies. We also briefly overview upcoming and proposed UHECR experiments and discuss their projected science reach.

Original language	English (US)
Article number	23
Journal	Frontiers in Astronomy and Space Sciences
Volume	6
DOIs	https://doi.org/10.3389/fspas.2019.00023
State	Published - Jun 4 2019

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics

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10.3389/fspas.2019.00023

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Alves Batista, R., Biteau, J., Bustamante, M., Dolag, K., Engel, R., Fang, K., Kampert, K. H., Kostunin, D., Mostafa, M., Murase, K., Oikonomou, F., Olinto, A. V., Panasyuk, M. I., Sigl, G., Taylor, A. M., & Unger, M. (2019). Open Questions in Cosmic-Ray Research at Ultrahigh Energies. Frontiers in Astronomy and Space Sciences, 6, [23]. https://doi.org/10.3389/fspas.2019.00023

Alves Batista, Rafael ; Biteau, Jonathan ; Bustamante, Mauricio ; Dolag, Klaus ; Engel, Ralph ; Fang, Ke ; Kampert, Karl Heinz ; Kostunin, Dmitriy ; Mostafa, Miguel ; Murase, Kohta ; Oikonomou, Foteini ; Olinto, Angela V. ; Panasyuk, Mikhail I. ; Sigl, Guenter ; Taylor, Andrew M. ; Unger, Michael. / Open Questions in Cosmic-Ray Research at Ultrahigh Energies. In: Frontiers in Astronomy and Space Sciences. 2019 ; Vol. 6.

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Open Questions in Cosmic-Ray Research at Ultrahigh Energies. / Alves Batista, Rafael; Biteau, Jonathan; Bustamante, Mauricio; Dolag, Klaus; Engel, Ralph; Fang, Ke; Kampert, Karl Heinz; Kostunin, Dmitriy; Mostafa, Miguel ; Murase, Kohta; Oikonomou, Foteini; Olinto, Angela V.; Panasyuk, Mikhail I.; Sigl, Guenter; Taylor, Andrew M.; Unger, Michael.

In: Frontiers in Astronomy and Space Sciences, Vol. 6, 23, 04.06.2019.

Research output: Contribution to journal › Review article

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