View in EDS PDF Full Text

New local interstellar spectra for protons, helium and carbon derived from PAMELA and Voyager 1 observations.

Saved in:
Bibliographic Details
Title: New local interstellar spectra for protons, helium and carbon derived from PAMELA and Voyager 1 observations.
Authors: Bisschoff, D.1 driaan.b@gmail.com, Potgieter, M.1
Source: Astrophysics & Space Science. Feb2016, Vol. 361 Issue 2, p1-8. 8p.
Subjects: Astrophysics, Voyager program, Space vehicles, Interstellar medium, Helium, Carbon, Cosmic rays
Abstract: 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. Spectra for specifically protons, helium and carbon nuclei, computed by galactic propagation models, can now be compared with observations at low energies from Voyager 1 and at high energies from the PAMELA space detector at Earth. We set out to reproduce the Voyager 1 observations in the energy range of 6 MeV/nuc to 60 MeV/nuc, and the PAMELA spectrum above 50 GeV/nuc, using the GALPROP code, similarly to our previous study for Voyager 1 electrons. By varying the galactic diffusion parameters in the GALPROP plain diffusion model, specifically the rigidity dependence of spatial diffusion, and then including reacceleration, we compute spectra simultaneously for galactic protons, helium and carbon. We present new local interstellar spectra, with expressions for the energy range of 3 MeV/nuc to 100 GeV/nuc, which should be of value for solar modulation modeling. [ABSTRACT FROM AUTHOR]
Copyright of Astrophysics & Space Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Links:
  – Type: pdflink
Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 112084033
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: New local interstellar spectra for protons, helium and carbon derived from PAMELA and Voyager 1 observations.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Bisschoff%2C+D%2E%22">Bisschoff, D.</searchLink><relatesTo>1</relatesTo><i> driaan.b@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Potgieter%2C+M%2E%22">Potgieter, M.</searchLink><relatesTo>1</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Astrophysics+%26+Space+Science%22">Astrophysics & Space Science</searchLink>. Feb2016, Vol. 361 Issue 2, p1-8. 8p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Astrophysics%22">Astrophysics</searchLink><br /><searchLink fieldCode="DE" term="%22Voyager+program%22">Voyager program</searchLink><br /><searchLink fieldCode="DE" term="%22Space+vehicles%22">Space vehicles</searchLink><br /><searchLink fieldCode="DE" term="%22Interstellar+medium%22">Interstellar medium</searchLink><br /><searchLink fieldCode="DE" term="%22Helium%22">Helium</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon%22">Carbon</searchLink><br /><searchLink fieldCode="DE" term="%22Cosmic+rays%22">Cosmic rays</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: 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. Spectra for specifically protons, helium and carbon nuclei, computed by galactic propagation models, can now be compared with observations at low energies from Voyager 1 and at high energies from the PAMELA space detector at Earth. We set out to reproduce the Voyager 1 observations in the energy range of 6 MeV/nuc to 60 MeV/nuc, and the PAMELA spectrum above 50 GeV/nuc, using the GALPROP code, similarly to our previous study for Voyager 1 electrons. By varying the galactic diffusion parameters in the GALPROP plain diffusion model, specifically the rigidity dependence of spatial diffusion, and then including reacceleration, we compute spectra simultaneously for galactic protons, helium and carbon. We present new local interstellar spectra, with expressions for the energy range of 3 MeV/nuc to 100 GeV/nuc, which should be of value for solar modulation modeling. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Astrophysics & Space Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=112084033
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s10509-015-2633-8
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 1
    Subjects:
      – SubjectFull: Astrophysics
        Type: general
      – SubjectFull: Voyager program
        Type: general
      – SubjectFull: Space vehicles
        Type: general
      – SubjectFull: Interstellar medium
        Type: general
      – SubjectFull: Helium
        Type: general
      – SubjectFull: Carbon
        Type: general
      – SubjectFull: Cosmic rays
        Type: general
    Titles:
      – TitleFull: New local interstellar spectra for protons, helium and carbon derived from PAMELA and Voyager 1 observations.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Bisschoff, D.
      – PersonEntity:
          Name:
            NameFull: Potgieter, M.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 02
              Text: Feb2016
              Type: published
              Y: 2016
          Identifiers:
            – Type: issn-print
              Value: 0004640X
          Numbering:
            – Type: volume
              Value: 361
            – Type: issue
              Value: 2
          Titles:
            – TitleFull: Astrophysics & Space Science
              Type: main
ResultId 1