Direct measurements of cosmic rays and their possible interpretations
arXiv:2310.15442 · doi:10.22323/1.444.0020
Abstract
The last two decades have brought spectacular advances in astrophysics of cosmic rays (CRs) and space- and ground-based astronomy. Launches of missions that employ forefront detector technologies enabled measurements with large effective areas, wide fields of view, and precision that we recently could not even dream of. Meanwhile, interpretation of the individual slices of information about the internal working of the Milky Way provided by such experiments poses challenges to the traditional astrophysical models. New mysteries arise in the composition and spectra of CR species at low and high energies, in the energy range where we thought the main features were already understood fairly well. This accumulation of unsolved puzzles highlights the peculiarity of the current epoch and means that major breakthroughs are still ahead. In my talk, I review the current state of direct measurements of CRs and discuss their possible interpretations. Unfortunately, many important ideas and publications are not discussed here due to the space limitations.
24 pages, invited review talk, Proceedings of the 38th International Cosmic Ray Conference (ICRC2023), 26 July - 3 August, 2023, Nagoya, Japan. The DOI link provides an access to the slides (Supplementary files)
References in corpus (30)
- Observation of an anomalous positron abundance in the cosmic radiation
- Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
- Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth
- The origin of the positron excess in cosmic rays
- Measurement of the cosmic-ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite
- Spectral breaks as a signature of cosmic ray induced turbulence in the Galaxy
- High-energy antiprotons from old supernova remnants
- Explosive lithium production in the classical nova V339 Del (Nova Delphini 2013)
- Testing astrophysical models for the PAMELA positron excess with cosmic ray nuclei
- Time resolved 2 million year old supernova activity discovered in Earth's microfossil record
- Cosmic Ray Antiprotons at High Energies
- Observation of Spectral Structures in the Flux of Cosmic-Ray Protons from 50 GeV to 60 TeV with the Calorimetric Electron Telescope on the International Space Station
- Cosmic ray production in supernova remnants including reacceleration: the secondary to primary ratio
- Distances, Radial Distribution and Total Number of Galactic Supernova Remnants
- The Galactic Al emission map as revealed by INTEGRAL/SPI
- Interpretation of the cosmic ray positron and antiproton fluxes
- GeV-TeV Cosmic Ray Leptons in the Solar System from the Bow Shock Wind Nebula of the Nearest Millisecond Pulsar J0437-4715
- On the origin of observed cosmic ray spectrum below 100 TV
- Interpretations of the cosmic ray secondary-to-primary ratios measured by DAMPE
- Plus Charge Prevalence in Cosmic Rays: Room for Dark Matter in the Positron Spectrum
- Cosmic-ray antiprotons in the AMS-02 era: A sensitive probe of dark matter
- Spectra of Cosmic Ray Sodium and Aluminum and Unexpected Aluminum Excess
- A Three-component Model for Cosmic-ray Spectrum and Dipole Anisotropy
- Statistically study the optimal local sources for cosmic ray nuclei and electron
- Understanding the phase reversals of Galactic cosmic ray anisotropies
- AAfrag 2.01: Interpolation routines for Monte Carlo results on secondary production including light antinuclei in hadronic interactions
- Can the Production Cross-Section Uncertainties Explain the Cosmic Fluorine Anomaly?
- Evidence of fresh cosmic ray in galactic plane based on DAMPE measurement of B/C and B/O ratios
- Implications of a Possible Spectral Structure of Cosmic-ray Protons Unveiled by the DAMPE
- Possible counterpart signal of the Fermi bubbles at the cosmic-ray positrons