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The Superbubble Model for LiBeB Production and Galactic Evolution

Published online by Cambridge University Press:  25 May 2016

Etienne Parizot  and
Luke Drury
Etienne Parizot
Affiliation:
Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland
Luke Drury
Affiliation:
Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland

Abstract

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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 10−1Z⊙.

Type
2. Production and Destruction of the Elements
Information
Symposium - International Astronomical Union , Volume 198: The Light Elements and their Evolution , 2000 , pp. 35 - 40
Copyright
Copyright © Astronomical Society of the Pacific 2000 

References

Bykov, A. M. 1995, Space Sci. Rev., 74, 397 Google Scholar
Bykov, A. M. 1999, in “LiBeB, cosmic rays and gamma-ray line astronomy”, ASP Conference Series, eds. Ramaty, R., Vangioni-Flam, E., Casse, M., Olive, K. Google Scholar
Bykov, A. M., & Fleishman, G. D. 1992, MNRAS, 255, 269 CrossRefGoogle Scholar
Fields, B. D., & Olive, K. A., 1999, ApJ, 516, 797 CrossRefGoogle Scholar
Fields, B. D., Olive, K. A., Vangioni-Flam, E., & Casse, M. 2000, submitted to ApJ (astro-ph/9911320) Google Scholar
Mac Low, M. M., & McCray, R., 1988, ApJ, 324, 776 Google Scholar
Markowith, A., & Kirk, J. G. 1999, A&A, 347, 391 Google Scholar
Parizot, E., & Drury, L. 1999a, A&A, 346, 686 Google Scholar
Parizot, E., & Drury, L. 1999b, A&A, 349, 673 Google Scholar
Parizot, E., & Drury, L. 2000a, A&A, submitted Google Scholar
Parizot, E., & Drury, L. 2000b, A&A, submitted Google Scholar
Ramaty, R., & Lingenfelter, R. E. 1999, in “LiBeB, cosmic rays and gamma-ray line astronomy”, ASP Conference Series, eds. Ramaty, R., Vangioni-Flam, E., Cassé, M., Olive, K. CrossRefGoogle Scholar
Ramaty, R., Scully, S. T., Lingenfelter, R. E., & Kozlovsky, B. 2000, ApJ, in press (astro-ph/9909021) Google Scholar
Vangioni-Flam, E., Cassé, M., Audouze, J., & Oberto, Y. 1990, ApJ 364, 586 Google Scholar
Vangioni-Flam, E., Cassé, M., & Audouze, J. 2000, submitted to Physics Reports Google Scholar
Woosley, S. E., & Weaver, T. A. 1995, ApJSS, 101, 181 Google Scholar