FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2086042711> ?p ?o ?g. }

• W2086042711 endingPage "2252" @default.
• W2086042711 startingPage "2243" @default.
• W2086042711 abstract "Applying power, coherence and magnetic and cross helicity spectral analysis of the solar wind plasma and magnetic field obtained by Helios‐1 and ‐2, we investigate the nature of MHD fluctuations occuring upstream and downstream of a parallel, supercritical, turbulent, of a quasi‐parallel, supercritical, turbulent, and of a quasi‐parallel, subcritical, laminar fast‐forward shock wave. The main results of our investigation are as follows: (1) The spectral slopes and powers vary significantly with the length of the data interval analyzed. The difference upstream of the parallel shock was such that the ratio of the axisymmetric spatial diffusion coefficients of a 1‐MeV proton, calculated from the 86.4‐min and 10.8‐min spectra using Morfill and Scholer's (1977) formula, is 11.82. (2) Counterstreaming Alfvén waves were identified immediately upstream and downstream of the quasi‐parallel, supercritical shock. (3) Fast magnetoacoustic waves were identified upstream of the quasi‐parallel, subcritical shock and far upstream of the quasi‐parallel, supercritical shock coinciding with the inclusion of a small transverse discontinuity in the spectral analysis. (4) Compressional turbulence which is not characteristic of either of the magnetoacoustic modes was observed downstream of the parallel, supercritical and quasi‐parallel subcritical shocks. As regards the determination of the parallel diffusion coefficient from power spectra of the observed magnetic field fluctuations, we may conclude from our results that this procedure is susceptible to major errors due to the following reasons: First, there is no complete theory for the diffusion of energetic particles in regions where the MHD fluctuations cannot be labeled Alfvénic or magnetoacoustic. Second, equations for particle motion in a field of counterstreaming Alfvén waves (second Fermi process) are also lacking. Third, even the “Alfvénic” fluctuations are never 100% Alfvénic; i.e., a non‐Alfvénic component is usually present. Such “mixing” is also not considered in the present theories of energetic particle propagation. Fourth and last, it is not at all clear how much data before/after the shock waves should be analyzed to compute values of the parallel diffusion coefficient (κ ∥ ) or mean free path for scattering (λ ∥, s ) of an energetic particle. We show here that spectral analysis of the fluctuations 10.8 min., 43.2 min. and 86.4 min. upstream of the parallel shock yields reasonable, but very different, values of κ ∥ ." @default.
• W2086042711 created "2016-06-24" @default.
• W2086042711 creator A5088065896 @default.
• W2086042711 creator A5088682884 @default.
• W2086042711 date "1987-03-01" @default.
• W2086042711 modified "2023-09-27" @default.
• W2086042711 title "A study of MHD fluctuations upstream and downstream of quasi-parallel interplanetary shocks" @default.
• W2086042711 cites W1532465611 @default.
• W2086042711 cites W1963701191 @default.
• W2086042711 cites W1967132487 @default.
• W2086042711 cites W1974940593 @default.
• W2086042711 cites W1980012479 @default.
• W2086042711 cites W1980382252 @default.
• W2086042711 cites W1990976582 @default.
• W2086042711 cites W1993322741 @default.
• W2086042711 cites W2008277413 @default.
• W2086042711 cites W2033992199 @default.
• W2086042711 cites W2041752136 @default.
• W2086042711 cites W2044577747 @default.
• W2086042711 cites W2046133981 @default.
• W2086042711 cites W2054595354 @default.
• W2086042711 cites W2064221922 @default.
• W2086042711 cites W2070440744 @default.
• W2086042711 cites W2070932130 @default.
• W2086042711 cites W2082478865 @default.
• W2086042711 cites W2083645036 @default.
• W2086042711 cites W2087639189 @default.
• W2086042711 cites W2093991836 @default.
• W2086042711 cites W2102979622 @default.
• W2086042711 cites W2122271612 @default.
• W2086042711 cites W2128001627 @default.
• W2086042711 cites W2153597601 @default.
• W2086042711 doi "https://doi.org/10.1029/ja092ia03p02243" @default.
• W2086042711 hasPublicationYear "1987" @default.
• W2086042711 type Work @default.
• W2086042711 sameAs 2086042711 @default.
• W2086042711 citedByCount "31" @default.
• W2086042711 countsByYear W20860427112016 @default.
• W2086042711 countsByYear W20860427112017 @default.
• W2086042711 countsByYear W20860427112020 @default.
• W2086042711 countsByYear W20860427112021 @default.
• W2086042711 countsByYear W20860427112023 @default.
• W2086042711 crossrefType "journal-article" @default.
• W2086042711 hasAuthorship W2086042711A5088065896 @default.
• W2086042711 hasAuthorship W2086042711A5088682884 @default.
• W2086042711 hasConcept C105795698 @default.
• W2086042711 hasConcept C115260700 @default.
• W2086042711 hasConcept C118419359 @default.
• W2086042711 hasConcept C121332964 @default.
• W2086042711 hasConcept C126322002 @default.
• W2086042711 hasConcept C158980903 @default.
• W2086042711 hasConcept C165231844 @default.
• W2086042711 hasConcept C168110828 @default.
• W2086042711 hasConcept C185544564 @default.
• W2086042711 hasConcept C191172861 @default.
• W2086042711 hasConcept C196558001 @default.
• W2086042711 hasConcept C2781300812 @default.
• W2086042711 hasConcept C30475298 @default.
• W2086042711 hasConcept C31258907 @default.
• W2086042711 hasConcept C31532427 @default.
• W2086042711 hasConcept C33923547 @default.
• W2086042711 hasConcept C41008148 @default.
• W2086042711 hasConcept C57879066 @default.
• W2086042711 hasConcept C62520636 @default.
• W2086042711 hasConcept C69357855 @default.
• W2086042711 hasConcept C70477161 @default.
• W2086042711 hasConcept C71924100 @default.
• W2086042711 hasConcept C82706917 @default.
• W2086042711 hasConcept C97355855 @default.
• W2086042711 hasConceptScore W2086042711C105795698 @default.
• W2086042711 hasConceptScore W2086042711C115260700 @default.
• W2086042711 hasConceptScore W2086042711C118419359 @default.
• W2086042711 hasConceptScore W2086042711C121332964 @default.
• W2086042711 hasConceptScore W2086042711C126322002 @default.
• W2086042711 hasConceptScore W2086042711C158980903 @default.
• W2086042711 hasConceptScore W2086042711C165231844 @default.
• W2086042711 hasConceptScore W2086042711C168110828 @default.
• W2086042711 hasConceptScore W2086042711C185544564 @default.
• W2086042711 hasConceptScore W2086042711C191172861 @default.
• W2086042711 hasConceptScore W2086042711C196558001 @default.
• W2086042711 hasConceptScore W2086042711C2781300812 @default.
• W2086042711 hasConceptScore W2086042711C30475298 @default.
• W2086042711 hasConceptScore W2086042711C31258907 @default.
• W2086042711 hasConceptScore W2086042711C31532427 @default.
• W2086042711 hasConceptScore W2086042711C33923547 @default.
• W2086042711 hasConceptScore W2086042711C41008148 @default.
• W2086042711 hasConceptScore W2086042711C57879066 @default.
• W2086042711 hasConceptScore W2086042711C62520636 @default.
• W2086042711 hasConceptScore W2086042711C69357855 @default.
• W2086042711 hasConceptScore W2086042711C70477161 @default.
• W2086042711 hasConceptScore W2086042711C71924100 @default.
• W2086042711 hasConceptScore W2086042711C82706917 @default.
• W2086042711 hasConceptScore W2086042711C97355855 @default.
• W2086042711 hasIssue "A3" @default.
• W2086042711 hasLocation W20860427111 @default.
• W2086042711 hasOpenAccess W2086042711 @default.
• W2086042711 hasPrimaryLocation W20860427111 @default.
• W2086042711 hasRelatedWork W2023404799 @default.

• next