Contribution of stellar winds to the composition of cosmic rays - exotic Ne and Fe from Wolf-Rayet stars

Conference · Sun Jan 01 04:00:00 EST 1984 · Adv. Space Res.; (United States)

OSTI ID:5823498

Blake, J B; Dearborn, D S.P.

The results of previous calculations of the production of Al-26 and the enhancement of heavy isotopes of Fe by Wolf-Rayet (WR) stars are discussed. Mass fractions of Al-26 in WR ejects and in WR H-rich envelopes are given as a function of stellar mass. It is concluded that the predicted mass of Al-26 in the ISM and its galactic distribution are such that WR stars are expected to be a significant if not the major source of the Al-26. The results suggest that He-22 enhancement must be accompanied by 4-8X enhancement of Fe-57, 20-45X enhancement of Fe-58, and 5-10X enhancement of Co-59. The isotopes of Fe are found to be affected before an appreciable enhancement of Ne-22 occurs. The size of the Ne-22 enhancement depends on the details of the mass-loss history whereas the Fe enhancement does not. 11 references.

• Research Organization: Aerospace Corp., Los Angeles, CA
• OSTI ID: 5823498
• Report Number(s): CONF-8406167-
• Conference Information: Journal Name: Adv. Space Res.; (United States) Journal Volume: 4
• 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
ABUNDANCE
ALUMINIUM 26
ALUMINIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
COSMIC RADIATION
COSMIC RAY SOURCES
IONIZING RADIATIONS
IRON ISOTOPES
ISOTOPE RATIO
ISOTOPES
LIGHT NUCLEI
MAIN SEQUENCE STARS
NEON ISOTOPES
NUCLEI
ODD-ODD NUCLEI
RADIATIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STARS
STELLAR ACTIVITY
STELLAR WINDS
WOLF-RAYET STARS
YEARS LIVING RADIOISOTOPES