Absolute parameters of the eclipsing binary V821 Cas fromUBVRIlight curves and radial velocities

2009/02/18 by Ö. Çakırlı, O. Cakirli, C. İbanoǧlu +3 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Stellar, planetary, and galactic studies #astro-ph.SR

paper · pdf · doi:10.1111/j.1365-2966.2009.14651.x

11 pages, including 6 figures and 6 tables, accepted for publication in MNRAS

arxiv created 2009/02/18 · openalex publication_date 2009/04/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We present UBVRI photometric measurements and spectroscopic observations of the double-lined eclipsing binary V821 Cas. The radial velocities were obtained by means of the cross-correlation technique. Simultaneous analyses of the multiband light curves and RVs give the absolute parameters for the stars as: and ⁠. An analysis of the O–C residuals yielded an apsidal motion in the binary at a rate of ⁠, corresponding to an apsidal period of U= 118 ± 19 yr. Subtracting the relativistic contribution, we find that log k2obs=−2.590 which is in agreement with the value predicted by theoretical models. Comparison with current stellar evolution models gives an age of 5.6 × 108 yr for the system.

Citations

• Validation of the new Hipparcos reduction
• Newly discovered active binaries in the RasTyc sample of stellar X-ray sources
• The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs

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• The Surface Brightness-color Relations Based on Eclipsing Binary Stars: Toward Precision Better than 1% in Angular Diameter Predictions