Abundance of iron ions in the solar wind
1988; IOP Publishing; Volume: 329; Linguagem: Inglês
10.1086/166440
ISSN1538-4357
AutoresJulia Schmid, P. Bochsler, J. Geiss,
Tópico(s)Ionosphere and magnetosphere dynamics
Resumoview Abstract Citations (23) References (36) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Abundance of Iron Ions in the Solar Wind Schmid, J. ; Bochsler, P. ; Geiss, J. Abstract For a period of 4 yr near the maximum of solar cycle 21 iron and helium fluxes were measured in the solar wind. The ratio of the summed fluxes from 45,000 spectra is 400 (+50 percent, -30 percent) which is approximately 5 times lower than estimates of the solar surface value. This difference is attributed to the difference of first ionization potentials between the two elements, which leads to a preferential feeding of iron (with a lower ionization potential) into the coronal plasma, whereas helium has a tendency to remain below as a neutral species. A marked increase of the He/Fe ratio is observed in the driver gas following interplanetary shocks. Marginal depletions of helium relative to iron are found at the sector boundaries of the interplanetary magnetic field. Publication: The Astrophysical Journal Pub Date: June 1988 DOI: 10.1086/166440 Bibcode: 1988ApJ...329..956S Keywords: Abundance; Cosmochemistry; Iron; Metal Ions; Solar Wind; Helium; Interplanetary Medium; Ionization Potentials; Metallicity; Shock Wave Propagation; Solar Physics; INTERPLANETARY MEDIUM; SUN: ABUNDANCES; SUN: SOLAR WIND full text sources ADS |
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