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Acoustic oscillations in the K2III star arcturus

  • Session 1 Stellar Structure and Evolution
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Abstract

Simultaneous spectrometric and photometric observations have been performed, on the red giant star Arcturus (α Boo), in a search for radial velocity or luminosity variations related to global oscillations of the stellar structure. From a preliminary analysis of the spectrometric data, several frequencies have been discovered in the range from 1 to 50 μHz, the highest amplitude being of ∼60 ms−1 at 4.3 μHz. From the analysis of the photometric data, slight evidence of this variation has been found, yielding a value of ΔV/Δm=48 km s−1 mag−1.

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Authors and Affiliations

  1. Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain

    J. A. Belmonte, A. R. Jones, P. L. Pallé & T. Roca cortés

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  1. J. A. Belmonte
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  2. A. R. Jones
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  3. P. L. Pallé
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  4. T. Roca cortés
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Belmonte, J.A., Jones, A.R., Pallé, P.L. et al. Acoustic oscillations in the K2III star arcturus. Astrophys Space Sci 169, 77–84 (1990). https://doi.org/10.1007/BF00640689

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