Inferring the effective diffusion coefficient of galactic cosmic rays in the heliosheath
Saved in:
| Title: | Inferring the effective diffusion coefficient of galactic cosmic rays in the heliosheath |
|---|---|
| Authors: | Salvatore, S., Della Torre, S., Gervasi, M., La Vacca, G., Tjus, Julia, 1979 |
| Source: | Advances in Space Research. 76(8):4781-4792 |
| Subject Terms: | Turbulence, Diffusion coefficient, Galactic cosmic rays |
| Description: | The diffusion of Galactic Cosmic Rays (GCRs) into the heliosphere from the local interstellar spectrum is a stochastic process due to the scattering of particles with magnetic irregularities embedded in the solar wind. The process is influenced by energy losses and convection. Our knowledge of the solar wind turbulence properties and dynamics mostly relies on near-Earth and near-Sun observations. The solar wind turbulence behavior is still not well understood when moving far away from the inner heliosphere. Nonetheless, it is still possible to infer some information about the diffusion coefficient by directly probing GCR measurements. In this work, we model the propagation of particles through the heliosheath, i.e. between ∼ 90 AU and ∼ 120 AU distance from the Sun, solving the Parker transport equation by means of a numerical Monte Carlo technique. We apply a data-driven approach based on in situ observations from Voyager 1 in order to study the solar modulation for different particles and derive the diffusion coefficient rigidity dependence. To do this, the most abundant elements in the solar system are considered together with their corresponding isotopes. We conclude that the effective diffusion coefficient, in the energy range from 0.04 to 0.31 GeV/nuc, has a rigidity dependence of P γ with γ∼1.42-0.42 +0.63 . This result can be used to constrain the spectral behaviour of the turbulence in the heliosheath. |
| File Description: | electronic |
| Access URL: | https://research.chalmers.se/publication/547866 https://research.chalmers.se/publication/547866/file/547866_Fulltext.pdf |
| Database: | SwePub |
Full Text Finder 
Nájsť tento článok vo Web of Science | FullText | Text: Availability: 0 CustomLinks: – Url: https://research.chalmers.se/publication/547866# Name: EDS - SwePub (s4221598) Category: fullText Text: View record in SwePub – Url: https://resolver.ebscohost.com/openurl?sid=EBSCO:edsswe&genre=article&issn=18791948&ISBN=&volume=76&issue=8&date=20250101&spage=4781&pages=4781-4792&title=Advances in Space Research&atitle=Inferring%20the%20effective%20diffusion%20coefficient%20of%20galactic%20cosmic%20rays%20in%20the%20heliosheath&aulast=Salvatore%2C%20S.&id=DOI:10.1016/j.asr.2025.07.033 Name: Full Text Finder Category: fullText Text: Full Text Finder Icon: https://imageserver.ebscohost.com/branding/images/FTF.gif MouseOverText: Full Text Finder – Url: https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=EBSCO&SrcAuth=EBSCO&DestApp=WOS&ServiceName=TransferToWoS&DestLinkType=GeneralSearchSummary&Func=Links&author=Salvatore%20S Name: ISI Category: fullText Text: Nájsť tento článok vo Web of Science Icon: https://imagesrvr.epnet.com/ls/20docs.gif MouseOverText: Nájsť tento článok vo Web of Science |
|---|---|
| Header | DbId: edsswe DbLabel: SwePub An: edsswe.oai.research.chalmers.se.8ab70a06.e4e0.45b8.bc4b.67ee5ac09590 RelevancyScore: 1115 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 1114.736328125 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Inferring the effective diffusion coefficient of galactic cosmic rays in the heliosheath – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Salvatore%2C+S%2E%22">Salvatore, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Della+Torre%2C+S%2E%22">Della Torre, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Gervasi%2C+M%2E%22">Gervasi, M.</searchLink><br /><searchLink fieldCode="AR" term="%22La+Vacca%2C+G%2E%22">La Vacca, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Tjus%2C+Julia%22">Tjus, Julia</searchLink>, 1979 – Name: TitleSource Label: Source Group: Src Data: <i>Advances in Space Research</i>. 76(8):4781-4792 – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion+coefficient%22">Diffusion coefficient</searchLink><br /><searchLink fieldCode="DE" term="%22Galactic+cosmic+rays%22">Galactic cosmic rays</searchLink> – Name: Abstract Label: Description Group: Ab Data: The diffusion of Galactic Cosmic Rays (GCRs) into the heliosphere from the local interstellar spectrum is a stochastic process due to the scattering of particles with magnetic irregularities embedded in the solar wind. The process is influenced by energy losses and convection. Our knowledge of the solar wind turbulence properties and dynamics mostly relies on near-Earth and near-Sun observations. The solar wind turbulence behavior is still not well understood when moving far away from the inner heliosphere. Nonetheless, it is still possible to infer some information about the diffusion coefficient by directly probing GCR measurements. In this work, we model the propagation of particles through the heliosheath, i.e. between ∼ 90 AU and ∼ 120 AU distance from the Sun, solving the Parker transport equation by means of a numerical Monte Carlo technique. We apply a data-driven approach based on in situ observations from Voyager 1 in order to study the solar modulation for different particles and derive the diffusion coefficient rigidity dependence. To do this, the most abundant elements in the solar system are considered together with their corresponding isotopes. We conclude that the effective diffusion coefficient, in the energy range from 0.04 to 0.31 GeV/nuc, has a rigidity dependence of P γ with γ∼1.42-0.42 +0.63 . This result can be used to constrain the spectral behaviour of the turbulence in the heliosheath. – Name: Format Label: File Description Group: SrcInfo Data: electronic – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="https://research.chalmers.se/publication/547866" linkWindow="_blank">https://research.chalmers.se/publication/547866</link><br /><link linkTarget="URL" linkTerm="https://research.chalmers.se/publication/547866/file/547866_Fulltext.pdf" linkWindow="_blank">https://research.chalmers.se/publication/547866/file/547866_Fulltext.pdf</link> |
| PLink | https://erproxy.cvtisr.sk/sfx/access?url=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsswe&AN=edsswe.oai.research.chalmers.se.8ab70a06.e4e0.45b8.bc4b.67ee5ac09590 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.asr.2025.07.033 Languages: – Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 4781 Subjects: – SubjectFull: Turbulence Type: general – SubjectFull: Diffusion coefficient Type: general – SubjectFull: Galactic cosmic rays Type: general Titles: – TitleFull: Inferring the effective diffusion coefficient of galactic cosmic rays in the heliosheath Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Salvatore, S. – PersonEntity: Name: NameFull: Della Torre, S. – PersonEntity: Name: NameFull: Gervasi, M. – PersonEntity: Name: NameFull: La Vacca, G. – PersonEntity: Name: NameFull: Tjus, Julia IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 18791948 – Type: issn-print Value: 02731177 – Type: issn-locals Value: SWEPUB_FREE – Type: issn-locals Value: CTH_SWEPUB Numbering: – Type: volume Value: 76 – Type: issue Value: 8 Titles: – TitleFull: Advances in Space Research Type: main |
| ResultId | 1 |