Results 71 to 80 of about 3,083 (223)

UHECRs Propagation and Their Multimessengers: Upper Limits and the Impact of the Extragalactic Magnetic Field

The Astrophysical Journal
The detection of high-energy astrophysical multimessengers establishes a connection between ultra-high-energy cosmic rays (UHECRs) and powerful cosmic accelerators.
Rodrigo Sasse, Rubens Costa Jr., Adriel G.B. Mocellin, Carlos H. Coimbra-Araujo, R. C. Dos Anjos   +4 more
doaj   +1 more source

Bursty Precipitation of Relativistic Electrons Unveiled by CIRBE/REPTile‐2 Measurements and Their Physical Implications

AGU Advances, Volume 7, Issue 1, February 2026.
Abstract Energetic electron precipitation plays a pivotal role in shaping Earth's radiation belt dynamics and drives significant physical and chemical changes in the upper atmosphere. However, the detailed mechanisms governing the loss of relativistic electrons have remained unclear, largely due to the limited energy coverage and coarse resolution of ...
Zheng Xiang, Xinlin Li, Daniel N. Baker, Qianli Ma, Yang Mei, Declan O’Brien, Hong Zhao, David Brennan, Theodore Sarris, Yoshizumi Miyoshi, Yoshiya Kasahara, Takefumi Mitani, Takeshi Takashima, Michael A. Temerin   +13 more
wiley   +1 more source

Beyond the Local Void: A Data-driven Search for the Origins of the Amaterasu Particle

The Astrophysical Journal
We introduce a simulation-based inference framework to constrain the origins of individual ultra-high-energy cosmic rays by combining realistic three-dimensional propagation modeling with Bayesian parameter estimation.
Nadine Bourriche, Francesca Capel
doaj   +1 more source

Probing the Sources of Ultra-High-Energy Cosmic Rays—Constraints from Cosmic-Ray Measurements

Universe
Ultra-high-energy cosmic rays (UHECRs) are the most energetic particles known—and yet their origin is still an open question. However, with the precision and accumulated statistics of the Pierre Auger Observatory and the Telescope Array, in combination ...
Teresa Bister
doaj   +1 more source

On ultra-high energy cosmic rays [PDF]

Proceedings of Neutrino Oscillation Workshop — PoS(NOW2018), 2019
This paper summarizes some results on our understanding of the origin of ultra-high energy cosmic rays.
openaire   +1 more source

Acceleration of Ultra High Energy Cosmic Rays: Cosmic Zevatrons? [PDF]

, 2003
In this lecture I outline some of the underlying physics issues associated with accelerators plausibly capable of explaining the UHECRs up to ZeV energies. I concentrate on the concentrate on mechanisms and their constraints, but provide a brief background on on observations and the constraints they supply, as well.
openaire   +2 more sources

The importance of atmospheric monitoring at the Pierre Auger Observatory

EPJ Web of Conferences, 2017
The Pierre Auger Observatory is an ultra-high energy cosmic ray experiment employing a giant surface array of particle detectors together with telescopes to image fluorescence light from extensive air showers in the atmosphere.
Dawson Bruce R.
doaj   +1 more source

Observations of ultra-high energy cosmic rays

Journal of Physics: Conference Series, 2006
The status of measurements of the arrival directions, mass composition and energy spectrum of cosmic rays above 3 x 10^18 eV (3 EeV) is reviewed using reports presented at the 29th International Cosmic Ray Conference held in Pune, India, in August 2005.
openaire   +2 more sources

“ESPRESSO” ACCELERATION OF ULTRA-HIGH-ENERGY COSMIC RAYS [PDF]

The Astrophysical Journal, 2015
5 pages, 2 figures.
openaire   +2 more sources

Observation of ultra-high energy cosmic rays with the Telescope Array experiment

EPJ Web of Conferences, 2018
The origin of ultra-high energy cosmic rays (UHECRs) has been a longstanding mystery. The Telescope Array (TA) is the largest experiment in the northern hemisphere observing UHECR in Utah, USA. It aims to reveal the origin of UHECR by studying the energy
Takeishi Ryuji
doaj   +1 more source