Computer Science
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ssrv...78..117c&link_type=abstract
Space Science Reviews, Volume 78, Issue 1-2, pp. 117-128
Computer Science
43
Scientific paper
We use energy spectra of anomalous cosmic rays (ACRs) measured with the Cosmic Ray instrument on the Voyager 1 and 2 spacecraft during the period 1994/157-313 to determine several parameters of interest to heliospheric studies. We estimate that the strength of the solar wind termination shock is 2.42 (-0.08, +0.04). We determine the composition of ACRs by estimating their differential energy spectra at the shock and find the following abundance ratios: H/He = 5.6 (-0.5, +0.6), C/He = 0.00048 ± 0.00011, N/He = 0.011 ± 0.001, O/He = 0.075 ± 0.006, and Ne/He = 0.0050 ± 0.0004. We correlate our observations with those of pickup ions to deduce that the long-term ionization rate of neutral nitrogen at 1 AU is ˜ 8.3 × 10-7 s-1 and that the charge-exchange cross section for neutral N and solar wind protons is ˜ 1.0 × 10-15 cm2 at 1.1 keV. We estimate that the neutral C/He ratio in the outer heliosphere is 1.8(-0.7, +0.9) × 10-5. We also find that heavy ions are preferentially injected into the acceleration process at the termination shock.
Cummings Alan C.
Stone Edward C.
No associations
LandOfFree
Composition of Anomalous Cosmic Rays and Implications for the Heliosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Composition of Anomalous Cosmic Rays and Implications for the Heliosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composition of Anomalous Cosmic Rays and Implications for the Heliosphere will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1143995