| Issue |
A&A
Volume 390, Number 3, August II 2002
|
|
|---|---|---|
| Page(s) | 1027 - 1032 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20020769 | |
| Published online | 14 August 2002 | |
Analysis of a δ Scuti spectroscopic binary: CQ Lyncis*
1
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
Received:
2
April
2002
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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