Galactic Cosmic Rays from Superbubbles and the Abundances of Lithium, Beryllium, and Boron | Zendy

Andreu Alibés | Zendy; J. Labay | Zendy; R. Canal | Zendy

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Galactic Cosmic Rays from Superbubbles and the Abundances of Lithium, Beryllium, and Boron

Author(s) -

Andreu Alibés,

J. Labay,

R. Canal

Publication year - 2002

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/339937

Subject(s) - physics , nucleosynthesis , supernova , superbubble , cosmic ray , astrophysics , galaxy , interstellar medium , stellar nucleosynthesis , astronomy , stars , milky way , chemical evolution , cosmic ray spallation , beryllium , ultra high energy cosmic ray , nuclear physics

In this article we study the galactic evolution of the LiBeB elements withinthe framework of a detailed model of the chemical evolution of the Galaxy thatincludes galactic cosmic ray nucleosynthesis by particles accelerated insuperbubbles. The chemical composition of the superbubble consists of varyingproportions of ISM and freshly supernova synthesized material. Theobservational trends of 6 LiBeB evolution are nicely reproduced by models inwhich GCR come from a mixture of 25% of supernova material with 75% of ISM,except for 6 Li, for which maybe an extra source is required at lowmetallicities. To account for 7 Li evolution several additional sources havebeen considered (neutrino-induced nucleosynthesis, nova outbursts, C-stars).The model fulfills the energetic requirements for GCR acceleration.Comment: 25 pages, 9 figures. Accepted for publication in the Astrophysical Journa

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