Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...390.1027c&link_type=abstract
Astronomy and Astrophysics, v.390, p.1027-1032 (2002)
Astronomy and Astrophysics
Astrophysics
4
Stars: Variables: Delta Sct, Stars: Binaries: Spectroscopic, Stars: Individual: Cq Lyn
Scientific paper
CQ Lyn is a new double-lined spectroscopic binary, composed of an Am delta 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: M=1.714 Msun, Teff=6760 K, log L/Lsun= 1.097 and log g=3.85 dex. Power spectra of HIPPARCOS photometry and CORAVEL radial velocities show multi-period pulsation behaviour. Three frequencies are identified: f1=8.86725, f2=8.81150 and f3=8.91007 c/d and are assumed to be l=2 f-modes split by rotation, considering their pulsation constants Q1=0.0356, Q2= 0.0359 and Q3=0.0355 d. Two combination oscillations are also present in the power spectrum at frequency f1+f2 and f2+f3. Based on observations collected at the 1.93-m and Swiss 1-m telescopes at the Haute-Provence Observatory (OHP, France), at the Belgian 1.2-m telescope at La Palma (ENO, Spain) and on data from the ESA HIPPARCOS satellite.
Carquillat Jean-Michel
Carrier Fabien
Debernardi Y.
Ginestet Nicole
Udry Stephane
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