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Enrichment of Neutron-Capture Elements in Our Galaxy at the Early Epoch

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The First Stars

Part of the book series: ESO ASTROPHYSICS SYMPOSIA ((ESO))

Abstract.

Recent observations of halo stars show large dispersions in abundances, especially for neutron-capture elements. These dispersions may indicate that the inter-stellar medium was not mixed well at the early epoch. If star formations are induced by supernovae, chemical compositions of stars should be determined by each supernova yield. Under this assumption, we construct a new evolution model of our Galaxy. We examine distributions of stellar abundance ratios, and find the inhomogenious enrichment causes the observed dispersions. We also determine the origins of neutron-capture elements, by comparing our results with observations.

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Authors and Affiliations

  1. Department of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

    Yuhri Ishimaru

  2. Division of Theoretical Astrophysics, National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

    Shinya Wanajo

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  1. Yuhri Ishimaru
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  2. Shinya Wanajo
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Achim Weiss Tom G. Abel Vanessa Hill

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Ishimaru, Y., Wanajo, S. Enrichment of Neutron-Capture Elements in Our Galaxy at the Early Epoch. In: Weiss, A., Abel, T.G., Hill, V. (eds) The First Stars. ESO ASTROPHYSICS SYMPOSIA. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10719504_34

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  • DOI: https://doi.org/10.1007/10719504_34

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-67222-7

  • Online ISBN: 978-3-540-46461-7

  • eBook Packages: Springer Book Archive

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