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Asteroseismology of the β Cephei Star 12 (DD) Lacertae

Published online by Cambridge University Press:  08 February 2017

W.A. Dziembowski  and
M. Jerzykiewicz
W.A. Dziembowski
Affiliation:
Copernicus Astronomical Center, ul. Bartycka 18, 00-716 Warsaw, Poland
M. Jerzykiewicz
Affiliation:
Wroclaw University Observatory, ul. Kopernika 11, 51-622 Wroclaw, Poland

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The frequency spectrum in Fig. 1 shows that at least five pulsation modes are excited in DD Lac. Three frequencies, f1, f4, and f3, form an equidistant triplet. In addition to the value of the central frequency, f4, the triplet can be characterized by the mean separation, S = (f3 − f1)/2, and the asymmetry, Δf = f4 − (f1 + f3)/2. Taking the values of the frequencies from a recent analysis of all available data (Pigulski 1994), we get S = 0.15544 ± 0.00021 and Δf = −0.00014 ± 0.00029 d−1.

Type
VI. Asteroseismology II
Information
Symposium - International Astronomical Union , Volume 185: New Eyes to See Inside the Sun and Stars , 1998 , pp. 379 - 382
Copyright
Copyright © Kluwer 1998 

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