Elemental Composition and Energy Spectra of Galactic Cosmic Rays During Solar Cycle 23

Details Elemental Composition and Energy Spectra of Galactic Cosmic Rays During Solar Cycle 23 Elemental Composition and Energy Spectra of Galactic Cosmic Rays During Solar Cycle 23

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...698.1666g&link_type=abstract

The Astrophysical Journal, Volume 698, Issue 2, pp. 1666-1681 (2009).

Astronomy and Astrophysics

Astronomy

12

Cosmic Rays, Galaxy: Abundances, Sun: Activity

Scientific paper

We report improved measurements of elemental abundances and spectra for galactic cosmic-ray (GCR) nuclei obtained by the Cosmic Ray Isotope Spectrometer on board NASA's Advanced Composition Explorer (ACE) spacecraft during the minimum and maximum phases of solar cycle 23. We discuss results for particles with nuclear charge 5 <= Z <= 28 and typical energies between 50 and 500 MeV nucleon-1. We demonstrate that a detailed "leaky box" Galactic propagation model combined with a spherically symmetric solar modulation model gives a good (but not perfect) fit to the observed spectra by using a solar modulation parameter of phi = 325 MV at solar minimum and phi = 900 MV at solar maximum. Although our results are generally consistent with previous measurements from space-based and balloon-based missions, there are significant differences. The large geometrical acceptance and excellent charge resolution of the instrument result in the most detailed and statistically significant record of GCR composition to date in this energy range. The measurements reported here serve as a high-precision baseline for continued studies of GCR composition, solar modulation over the solar cycle, space radiation hazards, and other applications.

Affiliated with

Also associated with

No associations

Rating

Elemental Composition and Energy Spectra of Galactic Cosmic Rays During Solar Cycle 23 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 Elemental Composition and Energy Spectra of Galactic Cosmic Rays During Solar Cycle 23, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elemental Composition and Energy Spectra of Galactic Cosmic Rays During Solar Cycle 23 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-776570