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GALPROP cosmic-ray propagation code: recent results and updates.

Elena Orlando1, Gudlaugur Johannesson2, Igor V Moskalenko1

  • 1Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305, USA; Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA.

Nuclear and Particle Physics Proceedings
|October 29, 2021
PubMed
Summary
This summary is machine-generated.

GALPROP, a cosmic-ray (CR) propagation code, models CR composition and galactic distribution using diffuse emission data. Recent advancements refine models, improving understanding of CR injection and interstellar medium interactions.

Keywords:
Cosmic raysGalaxyastroparticle physicsdiffusiongamma raysradio

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Area of Science:

  • Astrophysics
  • Cosmic Ray Physics
  • High-Energy Astrophysics

Background:

  • Cosmic-ray (CR) composition is studied via direct measurements.
  • CR distribution in the Galaxy is inferred from diffuse emissions (radio to gamma rays).
  • Precise observations challenge existing CR propagation models.

Purpose of the Study:

  • To review the latest applications of the GALPROP code.
  • To discuss ongoing and future improvements to GALPROP.
  • To analyze the impact of different propagation models and dimensionality on CR studies.

Main Methods:

  • Utilizing the GALPROP code, a unified framework for CR propagation.
  • Interpreting direct CR measurements and associated interstellar emissions.
  • Comparing results from cylindrically symmetrical models with 3D descriptions of the interstellar medium.

Main Results:

  • GALPROP provides a unified framework for interpreting diverse experimental data.
  • The code aids in understanding CR injection and propagation in the interstellar medium.
  • Accounting for all observables enhances the ability to reveal new phenomena.

Conclusions:

  • GALPROP is a crucial tool for understanding cosmic rays and their interactions.
  • Transitioning to 3D models offers a more accurate description of the interstellar medium.
  • Continued development of GALPROP is essential for advancing cosmic ray research.