dc.contributor |
Háskóli Íslands |
dc.contributor |
University of Iceland |
dc.contributor.author |
Boschini, M. J. |
dc.contributor.author |
Torre, S. Della |
dc.contributor.author |
Gervasi, M. |
dc.contributor.author |
Grandi, D. |
dc.contributor.author |
Jóhannesson, Guðlaugur |
dc.contributor.author |
Vacca, G. La |
dc.contributor.author |
Masi, N. |
dc.contributor.author |
Moskalenko, I. V. |
dc.contributor.author |
Pensotti, S. |
dc.contributor.author |
Porter, T. A. |
dc.contributor.author |
Quadrani, L. |
dc.contributor.author |
Rancoita, P. G. |
dc.contributor.author |
Rozza, D. |
dc.contributor.author |
Tacconi, M. |
dc.date.accessioned |
2018-08-27T13:47:54Z |
dc.date.available |
2018-08-27T13:47:54Z |
dc.date.issued |
2018-05-04 |
dc.identifier.citation |
Boschini, M. J., Torre, S. D., Gervasi, M., Grandi, D., Jóhannesson, G., Vacca, G. L., . . . Tacconi, M. (2018). Deciphering the Local Interstellar Spectra of Primary Cosmic-Ray Species with HelMod. The Astrophysical Journal, 858(1), 61. doi:10.3847/1538-4357/aabc54 |
dc.identifier.issn |
0004-637X |
dc.identifier.issn |
1538-4357 (eISSN) |
dc.identifier.uri |
https://hdl.handle.net/20.500.11815/803 |
dc.description.abstract |
Local interstellar spectra (LIS) of primary cosmic ray (CR) nuclei, such as helium, oxygen, and mostly primary carbon are derived for the rigidity range from 10 MV to ~200 TV using the most recent experimental results combined with the state-of-the-art models for CR propagation in the Galaxy and in the heliosphere. Two propagation packages, GALPROP and HelMod, are combined into a single framework that is used to reproduce direct measurements of CR species at different modulation levels, and at both polarities of the solar magnetic field. The developed iterative maximum-likelihood method uses GALPROP-predicted LIS as input to HelMod, which provides the modulated spectra for specific time periods of the selected experiments for model–data comparison. The interstellar and heliospheric propagation parameters derived in this study are consistent with our prior analyses using the same methodology for propagation of CR protons, helium, antiprotons, and electrons. The resulting LIS accommodate a variety of measurements made in the local interstellar space (Voyager 1) and deep inside the heliosphere at low (ACE/CRIS, HEAO-3) and high energies (PAMELA, AMS-02). |
dc.description.sponsorship |
This work is supported by ASI (Agenzia Spaziale Italiana) through a contract ASI-INFN I/002/13/0 and by ESA (European Space Agency) through a contract 4000116146/16/NL/HK. I.V.M. and T.A.P. acknowledge support from NASA Grant No. NNX17AB48G. We thank the ACE/CRIS instrument team and the ACE Science Center for providing the ACE data. The HelMod team acknowledges use of the OMNI data and OMNIWeb (CDAWeb, ftp) services provided by the NASA/GSFC Space Physics Data Facility |
dc.format.extent |
61 |
dc.language.iso |
en |
dc.publisher |
American Astronomical Society |
dc.relation.ispartofseries |
The Astrophysical Journal;858(1) |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Cosmic rays |
dc.subject |
Elementary particles |
dc.subject |
Interplanetary medium |
dc.subject |
Heliosphere |
dc.subject |
Stjarneðlisfræði |
dc.subject |
Sólkerfið |
dc.subject |
Öreindir |
dc.title |
Deciphering the Local Interstellar Spectra of Primary Cosmic-Ray Species with HelMod |
dc.type |
info:eu-repo/semantics/article |
dc.description.version |
Peer Reviewed |
dc.identifier.journal |
The Astrophysical Journal |
dc.identifier.doi |
10.3847/1538-4357/aabc54 |
dc.contributor.department |
Raunvísindastofnun (HÍ) |
dc.contributor.department |
Science Institute (UI) |
dc.contributor.school |
Verkfræði- og náttúruvísindasvið (HÍ) |
dc.contributor.school |
School of Engineering and Natural Sciences (UI) |