Four-colour photometry of eclipsing binaries. XXIA Photometric analysis and apsidal motion study of V346 Centauri

Details Four-colour photometry of eclipsing binaries. XXIA Photometric analysis and apsidal motion study of V346 Centauri Four-colour photometry of eclipsing binaries. XXIA Photometric analysis and apsidal motion study of V346 Centauri

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...160..310g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 160, no. 2, May 1986, p. 310-320. Research supported by the Danish Board for A

Astronomy and Astrophysics

Astrophysics

21

Apsides, Eclipsing Binary Stars, Light Curve, Star Clusters, Stellar Evolution, Stellar Spectrophotometry, Ephemeris Time, Radial Velocity, Stellar Luminosity, Stellar Motions, Stellar Spectra, Ubv Spectra

Scientific paper

New accurate uvby light curves obtained in 1982 and 1983 with the 50 cm Danish La Silla ESO telescope of the detached early B-type eclipsing binary V 346 Cen have been analyzed and photometric elements calculated using the Wood (1982) model. An improved ephemeris and reliable determination of the apsidal motion period have been obtained, with a close to 0.5 radii ratio, an orbital inclination near 84 deg, a high 0.288 orbital eccentricity, and a 321 + or - 16 yr period of periastron revolution. Improved spectroscopic orbital element estimates are provided by supplementary spectroscopic observations, with larger temperature (26,500 and 24,000 K) and mass (12 and 8 solar masses) values than earlier estimates. Good agreement with stellar structure models of typical chemical composition is found, and data indicate an age of 10 million years, and show the primary to be evolved past the end of the main-sequence phase, while the secondary is essentially unevolved.

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