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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
Summary
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.
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.
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