Solution of Heliospheric Propagation: Unveiling the Local Interstellar Spectra of Cosmic-ray Species

Boschini, M.; Torre, S. Della; Gervasi, M.; Grandi, D.; Jóhannesson, G.; Kachelrieß, M.; Vacca, G. La; Masi, N.; Moskalenko, I. V.; Orlando, E.; Ostapchenko, S.; Pensotti, S.; Porter, T. A.; Quadrani, L.; Rancoita, P.G.; Rozza, D.; Tacconi, M.

doi:10.3847/1538-4357/aa6e4f

Cited by 149 publications

(201 citation statements)

References 130 publications

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“…At the same time, we also calculate the gamma-ray emission expected from the three models, assuming the hadronic propagation parameters as found in our previous works (i.e. [10] and [9]). Figure 3 shows the comparison of these predictions with Fermi LAT data for the intermediate latitudes as published in [1].…”

Section: Updates On the Multi-frequency Studies Of The Interstellar Ementioning

confidence: 99%

Multi-wavelength Signatures of Cosmic Rays in the Milky Way

Orlando¹,

Harrington²,

Strong³

2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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Cosmic rays (CRs) propagate in the Milky Way and interact with the interstellar medium and magnetic fields. These interactions produce emissions that span the electromagnetic spectrum, and are an invaluable tool for understanding the intensities and spectra of CRs in distant regions, far beyond those probed by direct CR measurements. We present updates on the study of CR properties by combining multi-frequency observations of the interstellar emission and latest CR direct measurements with propagation models. Finally, we make predictions for e-ASTROGAM and AMEGO, proposed gamma-ray missions with a special focus at the MeV energy range.

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Section: Updates On the Multi-frequency Studies Of The Interstellar Ementioning

confidence: 99%

Multi-wavelength Signatures of Cosmic Rays in the Milky Way

Orlando¹,

Harrington²,

Strong³

2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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“…Extremely important are the results of recent combined study of the interstellar-heliospheric propagation of light CR species [34], see also PoS(ICRC2017)278.…”

Section: Introductionmentioning

confidence: 99%

GALPROP Code for Galactic Cosmic Ray Propagation and Associated Photon Emissions

Moskalenko¹,

Johannesson²,

E.³

et al. 2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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Recent discoveries in astrophysics of cosmic rays (CR) and γ-ray astronomy demand more accurate and reliable CR propagation code. Having 21 years of development behind it, the GALPROP model has become a de-facto standard in astrophysics of CR, diffuse γ-rays, and searches of new physics. The GALPROP project is devoted to the development of a self-consistent model for CR propagation in the Galaxy and associated diffuse emissions (radio, microwave, X-rays, γ-rays). The project stimulated independent studies of the interstellar radiation field (ISRF), distribution of the interstellar gas (H 2 , H I, H II), synchrotron emission and the Galactic magnetic field, and a new study of the isotopic production cross sections. These studies provide necessary and unique input datasets for the GALPROP model. The code is optimized and parallelized and accessible as a standalone executable or library that can be linked to other codes enabling many other studies, such as Markov Chain Monte Carlo, MultiNest, SuperBayeS, and DarkSUSY. The new version of the code has many updates that improve its accuracy and capabilities. As always, the latest release of the code is available through the WebRun, a service to the scientific community enabling easy use of the GALPROP code via web browsers.35th International Cosmic Ray Conference

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“…Even though the data below ∼200 MeV/n (ACE/CRIS, Voyager 1) were not included into the MCMC scan, the agreement between the model predictions and data is remarkable. Here we provide only illustrative results, more detail could be found in [26].…”

Section: Pos(icrc2017)278mentioning

confidence: 99%

“…The GALPROP-HelMod spectrum appears slightly lower than the data in the range ∼7-20 GV, but the discrepancy does not exceed one standard deviation once the HelMod and AMS-02 errors are taken into account. More plots, tabulated spectra, and analytical fits to the derived LIS are given in paper [26].…”

Section: Pos(icrc2017)278mentioning

confidence: 99%

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Inside out: unveiling local interstellar spectra of cosmic ray species

Boschini¹,

Torre²,

Gervasi³

et al. 2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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Local interstellar spectra (LIS) for protons, helium and antiprotons are built using the most recent experimental results combined with state-of-the-art models for propagation in the Galaxy and Heliosphere. Two propagation packages, GALPROP and HelMod, are combined to provide a single framework that is run to reproduce direct measurements of cosmic ray (CR) species at different modulation levels and at both polarities of the solar magnetic field. To do so in a selfconsistent way, an iterative procedure was developed, where the GALPROP LIS output is fed into HelMod that provides modulated spectra for specific time periods of selected experiments to compare with the data. The parameters were tuned with a maximum likelihood procedure using an extensive data set of proton spectra from 1997-2015. The proposed LIS accommodate both the low energy interstellar CR spectra measured by Voyager 1 and the high energy observations by BESS, PAMELA, AMS-01, and AMS-02 made from the balloons and near-Earth payloads. The proton LIS also accounts for Ulysses counting rate features measured out of the ecliptic plane. The obtained solution is in a good agreement with proton, helium, and antiproton data by AMS-02, BESS, and PAMELA in the whole energy range.

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Solution of Heliospheric Propagation: Unveiling the Local Interstellar Spectra of Cosmic-ray Species

Cited by 149 publications

References 130 publications

Multi-wavelength Signatures of Cosmic Rays in the Milky Way

Multi-wavelength Signatures of Cosmic Rays in the Milky Way

GALPROP Code for Galactic Cosmic Ray Propagation and Associated Photon Emissions

Inside out: unveiling local interstellar spectra of cosmic ray species

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