2000/02/09 by Etienne Parizot, Parizot, Etienne, Luke Drury +1
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0002208
6 pages, 4fig., Proc. of the IAU Symposium 198 "The Light Elements and Their Evolution", eds. L. da Silva, M. Spite, J.R. de Medeiros
arxiv created 2000/02/09 · arxiv updated 2009/12/01
We show that the available constraints relating to 6LiBeB Galactic evolution can be accounted for by the so-called superbubble model, according to which particles are efficiently accelerated inside superbubbles out of a mixture of supernova ejecta and ambient interstellar medium. The corresponding energy spectrum is required to be flat at low energy (in E-1 below 500 MeV/n, say), as expected from Bykov's acceleration mechanism. The only free parameter is also found to have the value expected from standard SB dynamical evolution models. Our model predicts a slope 1 (primary) and a slope 2 (secondary) behaviour at respectively low and high metallicity, with all intermediate slopes achieved in the transition region, between 10-2 and 10-1 Zsol.