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Gravities of Metal-Poor Halo Dwarfs and the Age of the Universe

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The First Stars

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

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Abstract.

We report on the methodology of an ongoing project to determine accurate stellar parameters (T eff , log g, [Fe/H], [\(\alpha\)/Fe]) for a number of metal-poor halo stars located at the turnoff (TO). With the aid of shift-free unified stellar evolutionary models we envision to derive absolute ages for these stars. Their ages will set stringent lower limits to the age of the Galaxy and the Universe.

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Authors and Affiliations

  1. Universitäts-Sternwarte München (USM), Scheinerstr.1, 81679, München

    Andreas J. Korn & Thomas Gehren

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  1. Andreas J. Korn
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  2. Thomas Gehren
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Achim Weiss Tom G. Abel Vanessa Hill

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Korn, A.J., Gehren, T. Gravities of Metal-Poor Halo Dwarfs and the Age of the Universe. In: Weiss, A., Abel, T.G., Hill, V. (eds) The First Stars. ESO ASTROPHYSICS SYMPOSIA. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10719504_13

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  • DOI: https://doi.org/10.1007/10719504_13

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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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