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Cosmic Ray Production of 6Li by Virialisation Shocks in the Early Milky Way

Published online by Cambridge University Press:  05 March 2013

Takeru K. Suzuki  and
Susumu Inoue
Takeru K. Suzuki*
Affiliation:
Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
Susumu Inoue
Affiliation:
Max-Planck-Institut für Astrophysik, 85741 Garching, Germany
*
3E-mail: stakeru@tap.scphys.kyoto-u.ac.jp
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Abstract

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The energy dissipated by virialisation shocks during hierarchical structure formation of the Galaxy can exceed that injected by concomitant supernova (SN) explosions. Cosmic rays (CRs) accelerated by such shocks may therefore dominate over SNe in the production of 6Li through α + α fusion without co-producing Be and B. This process can give a more natural account of the observed 6Li abundance in metal-poor stars compared to standard SN CR scenarios. Future searches for correlations between the 6Li abundance and the kinematic properties of halo stars may constitute an important probe of how the Galaxy and its halo formed. Furthermore, 6Li may offer interesting clues to some fundamental but currently unresolved issues in cosmology and structure formation on sub-galactic scales.

Keywords

cosmic raysGalaxy: formationGalaxy: haloGalaxy: kinematics and dynamicsnuclear reactions, nucleosynthesisstars: abundances
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 21 , Issue 2: The Fifth Workshop on Galactic Chemodynamics , 2004 , pp. 148 - 152
Copyright
Copyright © Astronomical Society of Australia 2004

References

Abadi, M. G., et al. 2003, ApJ, 591, 499 Google Scholar
Aoki, W., Inoue, S., Kawanomoto, S., Ryan, S. G., Smith, I. M., Suzuki, T. K., & Takada-Hidai, M. 2004, A&A, submittedGoogle Scholar
Asplund, M., Lambert, D. L., Nissen, P. E., Primas, F., & Smith, V. V. 2001, in Cosmic Evolution, eds. E. Vangioni-Flam, R. Ferlet, & M. Lemoine (Singapore: World Scientific), 95 Google Scholar
Bekki, K., & Chiba, M. 2001, ApJ, 558, 666 (BC)Google Scholar
Binney, J. 2004, MNRAS, 347, 1093 CrossRefGoogle Scholar
Birnboim, Y., & Dekel, A. 2003, MNRAS, 345, 349 Google Scholar
Boesgaard, A. M., Deliyannis, C. P., King, J. R., Ryan, S. G., Vogt, S. S., & Beers, T. C. 1999, AJ, 117, 1549 Google Scholar
Chiba, M., & Beers, T. C. 2000, AJ, 119, 2843 CrossRefGoogle Scholar
Duncan, D. K., Lambert, D. L., & Lemke, M. 1992, ApJ, 401, 584 Google Scholar
Eggen, O. J., Lynden-Bell, D., & Sandage, A. R. 1962, ApJ, 136, 748 CrossRefGoogle Scholar
Fields, B. D., & Olive, K. A. 1999, NewA, 4, 255 Google Scholar
Hobbs, L. M. 2000, PhR, 333, 449 Google Scholar
Jedamzik, K. 2000, PhRvL, 84, 3248 Google Scholar
Katz, N., Keres, D., Romeel, D., & Weinberg, D. H. 2003, in The IGM/Galaxy Connection — The Distribution of Baryons at z = 0, eds. J. L. Rosenberg, & M. E. Putman (Dordrecht: Kluwer), 185 Google Scholar
Madau, P., & Kuhlen, M. 2003, in Texas in Tuscany, Proceedings of the XXI Texas Symposium on Relativistic Astrophysics, eds. R. Bandiera, R. Maiolino, & F. Mannucci (Singapore: World Scientific), 31 Google Scholar
Meneguzzi, M., Audouze, J., & Reeves, H. 1971, A&A, 15, 337 Google Scholar
Miniati, F., Ryu, D., Kang, H., & Jones, T. W. 2001, ApJ, 559, 59 CrossRefGoogle Scholar
Nissen, P. E., Asplund, M., Hill, V., & D'Odorico, S. 2000, A&A, 357, L49 Google Scholar
Ostriker, J. P., & Steinhardt, P. 2003, Science, 300, 190 Google Scholar
Ramaty, R., Scully, S. T., Lingenfelter, R. E., & Kozlovsky, B. 2000, ApJ, 534, 747 Google Scholar
Ryan, S. G., Kajino, T., Beers, T. C., Suzuki, T. K., Romano, D., Matteucci, F., & Rosolankova, K. 2001, ApJ, 549, 55 CrossRefGoogle Scholar
Sakamoto, T., Chiba, M., & Beers, T. C. 2003, A&A, 397, 899 Google Scholar
Samland, M., & Gerhard, O. E. 2003, A&A, 399, 961 Google Scholar
Searle, L., & Zinn, R. 1978, ApJ, 225, 357 Google Scholar
Smith, V. V., Lambert, D. L., & Nissen, P. E. 1998, ApJ, 506, 405 Google Scholar
Spergel, D. N., et al. 2003, ApJS, 148, 175 Google Scholar
Suzuki, T. K., & Inoue, S. 2002, ApJ, 573, 168 (SI)Google Scholar
Suzuki, T. K., & Yoshii, Y. 2001, ApJ, 549, 303 (SY)Google Scholar
Suzuki, T. K., Yoshii, Y., & Kajino, T. 1999, ApJ, 522, L125 Google Scholar
Vangioni-Flam, E., Cassé, M., & Audouze, J. 2000, PhR, 333, 365 Google Scholar
White, S. D. M., & Rees, M. J. 1978, MNRAS, 183, 341 CrossRefGoogle Scholar