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Effect of stellar rotation on oscillation frequencies

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Abstract

We investigate whether the rotational splittings of β Cephei stars can give some clue about the existence of a differential rotation in latitude, and if they are contaminated by the cubic order effects of rotation on oscillation frequencies. We also study some properties of splitting asymmetries and axisymmetric mode frequencies which provide seismic constrains on the distortion of the star. We find that only non-perturbative methods are able to reproduce those two seismic characteristics within 0.01% error bars for stars when they rotate faster than 3.3%Ω k . If error bars of 1% are acceptable, the threshold of validity of perturbative methods is extended to 10%Ω k .

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Authors and Affiliations

  1. LESIA, Observatoire de Paris, 92195, Meudon, France

    R. M. Ouazzani, M. J. Goupil & D. Reese

  2. Université Pierre et Marie Curie, 75252, Paris, France

    R. M. Ouazzani

  3. Inst. d’Astrophysique et de Géophysique, Univ. de Liège, 4000, Liège, Belgium

    M. A. Dupret

  4. Department of Applied Mathematics, University of Sheffield, Sheffield, S3 7RH, UK

    D. Reese

Authors
  1. R. M. Ouazzani
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  2. M. J. Goupil
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  3. M. A. Dupret
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  4. D. Reese
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Correspondence to R. M. Ouazzani.

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Ouazzani, R.M., Goupil, M.J., Dupret, M.A. et al. Effect of stellar rotation on oscillation frequencies. Astrophys Space Sci 328, 285–289 (2010). https://doi.org/10.1007/s10509-010-0307-0

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  • DOI: https://doi.org/10.1007/s10509-010-0307-0

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