Isotopic anomalies in cosmic rays and winds from Wolf-Rayet stars - a new model

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

OSTI ID:5704747

Maeder, A

The insufficiency of the metal-rich supernovae model and of the Wolf-Rayet star model for explaining the isotopic anomalies in the galactic cosmic ray source (GCRS) is examined, and a new model for attacking the anomaly problem is proposed. The main properties of WR stars relevant to the study of GCRS are recalled, with particular emphasis on their chemical excesses and the steep galactic gradient in their distribution. The proposed model assumes that GCRs originate from two main sources of different composition and galactic distribution, probably SN's and WR stars. Their properties may change with galactocentric distance. The relevant physical physicochemical relationships are derived, and some approximations which account for the contributions of WR and SN sources in GCRS are worked out for comparison with observations. The model is found to account very well for the observed anomalies. 33 references.

• Research Organization: Geneve, Observatoire, Sauverny, Switzerland
• OSTI ID: 5704747
• 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
COSMIC RADIATION
COSMIC RAY SOURCES
ERUPTIVE VARIABLE STARS
IONIZING RADIATIONS
ISOTOPE RATIO
ISOTOPES
MAIN SEQUENCE STARS
MATHEMATICAL MODELS
RADIATIONS
STAR MODELS
STARS
STELLAR ACTIVITY
STELLAR WINDS
SUPERNOVAE
SURFACE PROPERTIES
VARIABLE STARS
WOLF-RAYET STARS