Details

Autor(en) / Beteiligte

• Brunsden, E
• Pollard, K R
• Wright, D J
• De Cat, P
• Cottrell, P L

Titel

Frequency and mode identification of γ Doradus from photometric and spectroscopic observations

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2018-04, Vol.475 (3), p.3813-3822

Ort / Verlag

Oxford University Press

Erscheinungsjahr

2018

Quelle

Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals

Beschreibungen/Notizen

• Abstract The prototype star for the γ Doradus class of pulsating variables was studied employing photometric and spectroscopic observations to determine the frequencies and modes of pulsation. The four frequencies found are self-consistent between the observation types and almost identical to those found in previous studies (1.3641 d−1, 1.8783 d−1, 1.4742 d−1, and 1.3209 d−1). Three of the frequencies are classified as l, m = (1, 1) pulsations and the other is ambiguous between l, m = (2, 0) and (2, −2) modes. Two frequencies are shown to be stable over 20 yr since their first identification. The agreement in ground-based work makes this star an excellent calibrator between high-precision photometry and spectroscopy with the upcoming TESS observations and a potential standard for continued asteroseismic modelling.