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Cosmic-Ray Lithium Production in the Nova Ejecta

Published online by Cambridge University Press:  17 October 2017

Norita Kawanaka  and
Shohei Yanagita
Norita Kawanaka
Affiliation:
Department of Astronomy, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku Kyoto, 606-8502, Japan Hakubi Center, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan email: norita@kusastro.kyoto-u.ac.jp
Shohei Yanagita
Affiliation:
Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
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Abstract

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Recent direct measurements of cosmic-ray (CR) light nuclei (protons, helium, and lithium) by AMS-02 have shown that the flux of each element has an unexpected hard component above ~300~GeV, and that the spectral indices of those components are almost the same (~2.5). This implies that there should be primary sources that produces CR lithium nuclei, which have been believed to be produced via spallation of heavier nuclei in the ISM (secondary origin). We propose the nearby Type Ia supernova following a nova eruption from a white dwarf as the origin of CR Li.

Keywords

supernovae: generalnovaecataclysmic variablesacceleration of particlessupernova remnantscosmic rays

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