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Asteroseismology

  • Conference paper
The Non-Sleeping Universe

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Abstract

Frequencies of oscillation have two major advantages as diagnostics of stellar properties: they can be measured with great precision; and they are simply related to the properties of the star. A crude measure of the characteristic pulsation periods of a star is provided by the dynamical time scale tdyn = [R3/(GM)]1/2 where R and M are the stellar radius and mass, and G is the gravitational constant (for the Sun tdyn ≃ 26 min). Thus the frequency of a single (identified) mode of oscillation essentially provides a measure of the mean density p ∝ M/R3 of the star. To obtain further information, more modes are required. In many pulsating stars, the spectrum of oscillation is in fact very rich.

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Authors and Affiliations

  1. Teoretisk Astrofysik Center, Danmarks Grundforskningsfond, and Institute for Fysik og Astronomi, Aarhus Universitet, DK-8000, Aarhus C, Denmark

    Jørgen Christensen-Dalsgaard

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  1. Jørgen Christensen-Dalsgaard
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Editor information

Editors and Affiliations

  1. University of Porto, Portugal

    M. T. V. T. Lago

  2. University of Strasbourg, France

    A. Blanchard

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© 1999 Springer Science+Business Media Dordrecht

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Christensen-Dalsgaard, J. (1999). Asteroseismology. In: Lago, M.T.V.T., Blanchard, A. (eds) The Non-Sleeping Universe. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4497-1_1

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  • DOI: https://doi.org/10.1007/978-94-011-4497-1_1

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-5923-7

  • Online ISBN: 978-94-011-4497-1

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