Volume 390, Number 3, August II 2002
|Page(s)||1027 - 1032|
|Section||Interstellar and circumstellar matter|
|Published online||14 August 2002|
Analysis of a δ Scuti spectroscopic binary: CQ Lyncis*
Observatoire de Genève, 51 chemin des Maillettes, 1290 Sauverny, Switzerland
2 Institut d'Astronomie de l'Université de Lausanne, 1290 Chavannes-des-Bois, Switzerland
3 Observatoire Midi-Pyrénées, Laboratoire d'Astrophysique, 14 Avenue Édouard Belin, 31400 Toulouse, France
Corresponding author: F. Carrier, Fabien.Carrier@obs.unige.ch
Accepted: 13 May 2002
CQ Lyn is a new double-lined spectroscopic binary, composed of an Am δ Scuti and a solar-like star, with an orbital period of 12.50736 d and a zero-eccentricity. Physical parameters of both stars are well constrained. The characteristics of the primary are the following: , K, and dex. Power spectra of Hipparcos photometry and Coravel radial velocities show multi-period pulsation behaviour. Three frequencies are identified: , and c/d and are assumed to be f-modes split by rotation, considering their pulsation constants , and d. Two combination oscillations are also present in the power spectrum at frequency f1+f2 and f2+f3.
Key words: stars: variables: δ Sct / stars: binaries: spectroscopic / stars: individual: CQ Lyn
© ESO, 2002
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