ON THE CONTRIBUTION OF GAMMA-RAY BURSTS TO THE GALACTIC INVENTORY OF SOME INTERMEDIATE-MASS NUCLEI

摘要

Light curves from a growing number of gamma-ray bursts (GRBs) indicate that GRBs copiously produce radioactive Ni moving outward at fractions of the speed of light. We calculate nuclear abundances of elements accompanying the outflowing Ni under the assumption that this Ni originates from a wind blown off of a viscous accretion disk. We also show that GRBs likely contribute appreciably to the Galactic inventory of ~(42)Ca, ~(45)Sc, ~(46)Ti, ~(49)Ti, and ~(63)Cu, and may be an important site for the production of ~(64)Zn.