The pulsating λ Bootis star HD 105759 |
| |
| Authors: | Peter Martinez C Koen G Handler & E Paunzen |
| |
| Institution: | South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa,;Institut fu¨r Astronomie der Universita¨t Wien, Tu¨rkenschanzstr. 17, A-1180 Wien, Austria |
| |
| 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. |
| |
| Keywords: | stars: chemically peculiar stars: individual: HD 105759 stars: oscillations stars: variables: other |
|
|
