Source composition of cosmic rays

Conference · Tue Mar 20 04:00:00 EST 1990 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:6866229

Silberberg, R; Tsao, C H ^[1]; Shapiro, M M ^[2]

---

1. Code 4154, E.O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, DC 20375-5000 (USA)
2. University of Maryland, College Park, MD 20472 (USA)

A theory is developed that yields great improvement in deriving the cosmic-ray source abundances for energies below 10{sup 12} eV/u. In addition, based on the acceleration theory of Voelk and Biermann and on nucleosynthesis processes in pre-supernova stars, a theory is presented for the source composition at 10{sup 12}--10{sup 15} eV/u. The strong shock wave of young supernova remnant accelerates the wind particles of the pre-supernova red, blue supergiant stars and Wolf-Rayet (WR) stars to energies up to 10{sup 15} eV/u. They contain the nucleosynthesis products of the CNO cycle and of He-burning. They accelerate the flare particles in interstellar space. The composition below 10{sup 12} eV/u differs from that of the general stellar photosphere by: (1) Suppression of elements with a large FIP ({gt}10 eV) by a factor of 4; (2) The depletion of light nuclei (Z{le}10); (3) A large contribution of WC stars to {sup 12}C, {sup 16}O and {sup 22}Ne, with renormalization of the initial (Z{gt}2)/(Z{le}2) abundances of Prantzos et al., based on general elemental abundances.

• OSTI ID: 6866229
• Report Number(s): CONF-8911161--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 203:1
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics & Cosmology-- Cosmic Radiation
640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METALS
CARBON
CHEMICAL COMPOSITION
COSMIC RADIATION
ELEMENTS
ENERGY RANGE
ERUPTIVE VARIABLE STARS
GEV RANGE
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
METALS
NITROGEN
NONMETALS
NUCLEI
NUCLEOSYNTHESIS
OXYGEN
PEV RANGE
RADIATIONS
SHOCK WAVES
SODIUM
STARS
SUPERNOVAE
SYNTHESIS
TEV RANGE
VARIABLE STARS