Secondary Antiprotons and Propagation of Cosmic Rays in the Galaxy and Heliosphere

  title={Secondary Antiprotons and Propagation of Cosmic Rays in the Galaxy and Heliosphere},
  author={Igor V. Moskalenko and A. W. Strong and J. F. Ormes and Marius S. Potgieter},
  journal={The Astrophysical Journal},
  pages={280 - 296}
High-energy collisions of cosmic-ray nuclei with interstellar gas are believed to be the mechanism producing the majority of cosmic-ray antiprotons. Because of the kinematics of the process, they are created with a nonzero momentum; the characteristic spectral shape with a maximum at ~2 GeV and a sharp decrease toward lower energies makes antiprotons a unique probe of models for particle propagation in the Galaxy and modulation in the heliosphere. On the other hand, accurate calculation of the… 


This work calculates antiproton production in pp-, pA-, and AA-interactions using EPOS-LHC and QGSJET-II-04, two of the most advanced Monte Carlo (MC) generators tuned to numerous accelerator data including those from the Large Hadron Collider.

Antiprotons and Cosmic-Ray Propagation in the Galaxy

Based on our three-dimensional cosmic-ray (CR) propagation model, we study the behavior of CR antiprotons (CR- p̄’s), and compare our numerical results with recent experimental data, particularly

Cosmic ray antiprotons at high energies

Cosmic ray antiprotons provide a powerful tool to probe dark matter annihilations in our galaxy. The sensitivity of this important channel is, however, diluted by sizable uncertainties in the

Secondary antiprotons as a Galactic Dark Matter probe

We present a novel determination of the astrophysical uncertainties associated to the secondary antiproton flux originating from cosmic-ray spallation on the interstellar gas. We select a set of

Study of Cosmic-Ray Light Nuclei Transport with GALPROP

The isotopes 2H and 3He in the cosmic radiation are mainly secondary products from interactions of primary cosmic rays in the interstellar medium. Secondary-to-primary ratios give important

Time Evolution of Galactic and Anomalous Cosmic-Ray Spectra in a Dynamic Heliosphere

Galactic and anomalous cosmic-ray modulation in a dynamic realistic heliosphere is studied. We present the time evolution of cosmic-ray spectra from solar minima to maxima as computed by a newly

Cosmic-ray propagation with DRAGON2: II. Nuclear interactions with the interstellar gas

Understanding the isotopic composition of cosmic rays (CRs) observed near Earth represents a milestone towards the identification of their origin. Local fluxes contain all the known stable and



Antiprotons from Spallations of Cosmic Rays on Interstellar Matter

Cosmic-ray antiprotons provide an important probe for the study of Galactic dark matter, as they could be produced by neutralino annihilations, primordial black holes evaporations, or other exotic

Cosmic Antiprotons as a Probe for Supersymmetric Dark Matter?

The flux of cosmic-ray antiprotons from neutralino annihilations in the Galactic halo is computed for a large sample of models in the minimal supersymmetric extension of the standard model (MSSM). We

Cosmic-ray antiprotons, positrons, and gamma rays from halo dark matter annihilation

The subject of cosmic ray antiproton production is reexamined by considering other choices for the nature of the Majorana fermion chi other than the photino considered in a previous article. The

Antiprotons in the cosmic radiation

Golden et al.1 have demonstrated that the measured ratio of the flux of antiprotons to protons (\[pmacr]/p ratio) is significantly greater than expected from the commonly adopted ‘leaky box’ model of

Propagation of Cosmic-Ray Nucleons in the Galaxy

We describe a method for the numerical computation of the propagation of primary and secondary nucleons, primary electrons, and secondary positrons and electrons. Fragmentation and energy losses are

A Measurement of the Cosmic-Ray Antiproton Flux and a Search for Antihelium

A balloon-borne instrument has measured the cosmic-ray antiproton flux between 130 and 320 MeV and searched for antihelium between 130 and 370 MeV per nuclear. These particles were selected from the

Diffuse Galactic γ-rays: Constraining Cosmic-Ray Origin and Propagation

We have developed a model which aims to reproduce observational data of many kinds related to cosmic-ray (CR) origin and propagation: direct measurements of nuclei, antiprotons, electrons and

A New Calculation of the Interstellar Secondary Cosmic-Ray Antiprotons

We present new results for the theoretical prediction of the interstellar secondary antiproton flux produced in cosmic ray interactions with the interstellar gas. The calculation is performed in the