Davie, M. W. ; Pollard, K. R. ; Cottrell, P. L. ; Brunsden, E. ; Wright, D. J. ; De Cat, P.

published in Publications of the Astronomical Society of Australia, 31, pp. e025 (2014)

Abstract: We present improvement and confirmation of identified frequencies and pulsation modes for the γ Doradus star HD 189631. This work improves upon previous studies by incorporating a significant number of additional spectra and precise determination of frequencies. Four frequencies were identified for this star: 1.6774 ± 0.0002 d-1, 1.4174 ± 0.0002 d-1, 0.0714 ± 0.0002 d-1, and 1.8228 ± 0.0002 d-1 which were identified with the modes (l,m) = (1, +1), (1, +1), (2, -2), and (1, +1) respectively. These findings are in agreement with the most recent literature. The prevalence of (l,m) = (1, +1) modes in γ Doradus stars is starting to become apparent and we discuss this result.

DOI: 10.1017/pasa.2014.20
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