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Time-resolved high-resolution spectroscopy of the pulsating sdB star QQ Vir (PG1325+101)

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Abstract

In March 2008 we obtained 2 nights of time-resolved high-resolution spectroscopy with UVES@VLT of the pulsating sdB QQ Vir (PG1325+101), totalling more than 750 spectra. We aim to study in detail the atmospheric response to the pulsations, and to derive observational constraints on the eigenmode of the main pulsation. In this paper we present the first preliminary results.

We follow the technique outlined in Telting et al. (Astron. Astrophys. 492:815, 2008) in order to obtain high-quality line-profile variations from phase-folded spectra. From the modelling of such line-profile variations we aim to derive constraints on the pulsational degree ℓ and azimuthal number m of the main pulsation mode in this star.

To facilitate accurate frequency determination of the pulsations in QQ Vir, and to strengthen the derivation of the degree ℓ of the main mode, we organised a photometric campaign around the spectroscopic observations. This photometric campaign will be discussed in a separate contribution (Baran et al. in Astrophys. Space Sci. 2010, this volume).

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Authors and Affiliations

  1. Nordic Optical Telescope, Apartado 474, 38710, Santa Cruz de La Palma, Spain

    J. Telting

  2. Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Leuven, Belgium

    R. Østensen, R. Oreiro & M. Vučković

  3. Dr. Remeis Sternwarte Bamberg, Universität Erlangen-Nürnberg, Nürnberg, Germany

    U. Heber

  4. European Southern Observatory, Garching, Germany

    S. Randall

  5. Cracow Pedagogical University, Cracow, Poland

    A. Baran

Authors
  1. J. Telting
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  2. R. Østensen
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  3. R. Oreiro
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  4. U. Heber
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  5. M. Vučković
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  6. S. Randall
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  7. A. Baran
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Corresponding author

Correspondence to J. Telting.

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Telting, J., Østensen, R., Oreiro, R. et al. Time-resolved high-resolution spectroscopy of the pulsating sdB star QQ Vir (PG1325+101). Astrophys Space Sci 329, 163–166 (2010). https://doi.org/10.1007/s10509-010-0333-y

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  • DOI: https://doi.org/10.1007/s10509-010-0333-y

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