The pulsating λ Bootis star HD 105759 (original) (raw)
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1South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa
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1South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa
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2Institut für Astronomie der Universität Wien, Türkenschanzstr. 17, A-1180 Wien, Austria
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2Institut für Astronomie der Universität Wien, Türkenschanzstr. 17, A-1180 Wien, Austria
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Visiting Astronomer: Cerro Tololo Inter-American Observatory, operated by the Associated Universities for Research in Astronomy, Inc., under contract with the National Science Foundation.
Published:
21 December 1998
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Peter Martinez, C. Koen, G. Handler, E. Paunzen, The pulsating λ Bootis star HD 105759, Monthly Notices of the Royal Astronomical Society, Volume 301, Issue 4, December 1998, Pages 1099–1103, https://doi.org/10.1046/j.1365-8711.1998.02070.x
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Abstract
We present spectroscopic and multisite time series photometric observations of the star HD 105759 which confirm that this is a new pulsating λ Bootis star. Our spectroscopy indicates an overall metallicity of [Z] = log Z − log Z⊙ = −1 and that _T_eff = 8000 ± 300 K and log g = 4.0 ± 0.2. The photometric data reveal that this star pulsates with at least five frequencies: 8.62, 12.69, 20.15, 21.27 and 23.66 d−1. These frequencies do not all match those found in an earlier single-site study, indicating that the pulsation spectrum changes with time.
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Author notes
†
Visiting Astronomer: Cerro Tololo Inter-American Observatory, operated by the Associated Universities for Research in Astronomy, Inc., under contract with the National Science Foundation.
© 1998 RAS
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