Helium abundance in the solar wind
โ Scribed by K. W. Ogilvie; T. D. Wilkerson
- Publisher
- Springer
- Year
- 1969
- Tongue
- English
- Weight
- 852 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0038-0938
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
During periods in 1969-1971 when interplanetary flow conditions were quiet, 17 determinations of the solar wind Fe and Si abundances and 7 of the O abundance were made. On the average (N(Fe)/N(H))= 5.3 โข 10 5, (N(Si)/N(H))=7.6 โข 10 -5 and (N(O)/N(H)) = 5.2 โข 10 -4. Variations from the averages over
Eight examples of persistent double ion streams with simultaneously resolved protons and alpha particles have been found in the 1971 and 1972 data from the Los Alamos plasma analyzer on IMP 6. The proton streams are observed to have greater velocity separations than their alpha particle counterparts
The existence of a long-term variation, related to the solar activity, of the average a-particle abundance in the solar wind has been suggested by Robbins et al. (1970) and recently confirmed by Bollea et al. (1972) andOgilvie (1972). Hirshberg et al. (1972b), comparing the distribution of the a-par