Open AccessThe pulsating λ Bootis star HD 105759
Author(s) -
Martinez Peter,
Koen C.,
Handler G.,
Paunzen E.
Publication year - 1998
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1998.02070.x
Subject(s) - physics , astrophysics , metallicity , star (game theory) , photometry (optics) , spectroscopy , astronomy , stars
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.