Astronomy & Space Science · AST-812
Cosmic Rays & Particle Acceleration: Structures & Vocabulary
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Structure
Structure of Cosmic Rays & Particle Acceleration
The cosmic-ray spectrum spans many orders of magnitude in energy and contains features called the knee and ankle. Candidate accelerators include supernova remnants, pulsar wind nebulae, jets from compact objects, and active galactic nuclei.
Evidence behind this section3 claims
Cosmic rays are high-energy charged particles, mostly atomic nuclei, arriving at Earth from the Sun, Galactic sources, and at the highest energies likely extragalactic accelerators.
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References & evidence
Source library for this chapter
These are the linked sources supporting the verified claims used throughout the lesson.
- 01Fermi Gamma-ray Space TelescopeOpen source ↗
NASA Science
- 02IceCube Detector and Neutrino AstronomyOpen source ↗
IceCube Neutrino Observatory
View claim-by-claim traceability3 verified claims
Shock acceleration and magnetic turbulence can repeatedly scatter charged particles across moving plasma boundaries, producing power-law energy distributions.
supported · checked Sep 22, 2026Gamma-ray observations trace interactions of energetic particles, supernova remnants show nonthermal synchrotron emission, and IceCube neutrinos identify environments where hadrons are accelerated.
supported · checked Sep 22, 2026Cosmic rays are high-energy charged particles, mostly atomic nuclei, arriving at Earth from the Sun, Galactic sources, and at the highest energies likely extragalactic accelerators.
supported · checked Sep 22, 2026