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High energy collisions of cosmic ray (CR) nuclei with interstellar gas are believed to be the mechanism producing the majority of CR antiprotons. The distinguishing spectral shape with a maximum at 2 GeV and a sharp decrease towards lower…

Astrophysics · Physics 2007-05-23 I. V. Moskalenko , A. W. Strong , J. F. Ormes , M. S. Potgieter , U. W. Langner

We perform a comprehensive analysis of cosmic-ray propagation using the time-dependent AMS-02 flux measurements covering a full solar cycle, with particular emphasis on the role of solar modulation. We fit two representative Galactic…

High Energy Astrophysical Phenomena · Physics 2026-02-23 Isabelle John , Alessandro Cuoco , Mattia Di Mauro

The local interstellar spectra (LIS's) for galactic cosmic rays (CR's) cannot be directly observed at the Earth below certain energies, because of solar modulation in the heliosphere. With Voyager 1 crossing the heliopause in 2012, in situ…

High Energy Astrophysical Phenomena · Physics 2019-06-19 D. Bisschoff , M. S. Potgieter , O. P. M. Aslam

High-energy collisions of cosmic-ray nuclei with interstellar gas are believed to be the mechanism producing the majority of cosmic ray antiprotons. Due to the kinematics of the process they are created with a nonzero momentum; the…

Astrophysics · Physics 2010-05-28 I. V. Moskalenko , A. W. Strong , J. F. Ormes , M. S. Potgieter

The PAMELA space experiment, in orbit since 2006, has measured cosmic rays through the most recent A < 0 solar minimum activity period. During this entire time, galactic electrons and protons have been detected down to 70 MV and 400 MV,…

High Energy Astrophysical Phenomena · Physics 2017-01-11 V. Di Felice , R. Munini , E. E. Vos , M. S. Potgieter

Local interstellar spectra (LIS) for protons, helium and antiprotons are built using the most recent experimental results combined with the state-of-the-art models for propagation in the Galaxy and heliosphere. Two propagation packages,…

Heliospheric modulation conditions were unusually quite during the last solar minimum activity between Solar Cycles 23/24. Fortunately, the PAMELA space-experiment measured six-month averaged Galactic positron spectra for the period July…

Space Physics · Physics 2019-03-14 O. P. M. Aslam , D. Bisschoff , M. S. Potgieter , M. Boezio , R. Munini

GALPROP is a numerical code for calculating the galactic propagation of relativistic charged particles and the diffuse emissions produced during their propagation. The code incorporates as much realistic astrophysical input as possible…

We use the GALPROP code for cosmic-ray (CR) propagation to calculate the broad-band luminosity spectrum of the Milky Way related to CR propagation and interactions in the interstellar medium. This includes gamma-ray emission from the…

High Energy Astrophysical Phenomena · Physics 2010-10-01 A. W. Strong , T. A. Porter , S. W. Digel , G. Johannesson , P. Martin , I. V. Moskalenko , E. J. Murphy

We extend previous work modeling the Galactic magnetic field in the plane using synchrotron emission in total and polarised intensity. In this work, we include a more realistic treatment of the cosmic-ray electrons using the GALPROP…

Astrophysics of Galaxies · Physics 2018-02-14 T. R. Jaffe , A. J. Banday , J. P. Leahy , S. Leach , A. W. Strong

On their way through the heliosphere, Galactic Cosmic Rays (GCRs) are modulated by various effects before they can be detected at Earth. This process can be described by the Parker equation, which calculates the phase space distribution of…

Space Physics · Physics 2017-11-28 Jan Gieseler , Bernd Heber , Konstantin Herbst

SALMON (Scalable Ab-initio Light-Matter simulator for Optics and Nanoscience, http://salmon-tddft.jp) is a software package for the simulation of electron dynamics and optical properties of molecules, nanostructures, and crystalline solids…

Context: The relation between Galactic cosmic-ray electrons, magnetic fields and synchrotron radiation. Aims: We exploit synchrotron radiation to constrain the low-energy interstellar electron spectrum, using various radio surveys and…

High Energy Astrophysical Phenomena · Physics 2011-10-03 A. W. Strong , E. Orlando , T. R. Jaffe

The Alpha Magnetic Spectrometer (AMS) is a new generation high-energy physics experiment installed on the International Space Station in May 2011 and operating continuously since then. Using an unprecedently large collection of particles…

High Energy Astrophysical Phenomena · Physics 2018-07-31 Nicola Tomassetti

With the cosmic ray observations made by the Voyager 1 spacecraft outside the dominant modulating influence of the heliosphere, the comparison of computed galactic spectra with experimental data at lower energies is finally possible.…

High Energy Astrophysical Phenomena · Physics 2016-01-20 Driaan Bisschoff , Marius S. Potgieter

The magnetised solar wind modulates the Galactic cosmic ray flux in the heliosphere up to rigidities as high as 40 GeV. In this work, we present a new and straightforward extension of the popular, but limited force-field model, thus…

High Energy Astrophysical Phenomena · Physics 2019-12-25 Marco Kuhlen , Philipp Mertsch

The cosmic-ray propagation code GALPROP has recently been enhanced in the areas of Galactic magnetic field and synchrotron radiation. A full 3D treatment is now implemented. We describe these enhancements and show applications to the…

Astrophysics of Galaxies · Physics 2009-07-06 E. Orlando , A. W. Strong , I. V. Moskalenko , T. A. Porter , G. Johannesson , S. W. Digel

Since the beginning of the space exploration era, solar activity was observed at its lowest level during 2006 to 2009. During this period, the PAMELA space experiment observed spectra for galactic cosmic rays, specifically for protons,…

Space Physics · Physics 2017-11-30 M. S. Potgieter , E. E. Vos , D. Bisschoff , J. L. Raath , M. Boezio , R. Munini , V. Di Felice

Before being detected at Earth, charged cosmic rays propagate across the Solar System and undergo interactions with the turbulent solar wind and with the heliospheric magnetic field. As a result, they are subject to a series of processes…

High Energy Astrophysical Phenomena · Physics 2018-11-08 Andrea Vittino , Carmelo Evoli , Daniele Gaggero

The precise spectra of Cosmic Ray (CR) electrons and positrons have been published by the measurement of AMS-02. It is reasonable to regard the difference between the electrons and positrons spectra ( $\triangle \Phi= \Phi_{e^-}-\Phi_{e^+}$…

High Energy Astrophysical Phenomena · Physics 2015-11-17 C. Jin , Y. Q. Guo , H. B. Hu