Absolute dimensions of eclipsing binaries. VII - V 1647 Sagittarii

Details Absolute dimensions of eclipsing binaries. VII - V 1647 Sagittarii Absolute dimensions of eclipsing binaries. VII - V 1647 Sagittarii

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...145..206a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 145, no. 1, April 1985, p. 206-214. Research supported by the Statens Naturvid

Astronomy and Astrophysics

Astrophysics

30

Eclipsing Binary Stars, Stellar Motions, Stellar Structure, Astronomical Photometry, Companion Stars, Orbital Elements, Radial Velocity, Stellar Evolution, Stellar Luminosity, Stellar Mass

Scientific paper

V1647 Sgr is an early A-type double-lined eclipsing binary with a highly eccentric orbit of rather short period (e = 0.41, P = 3d.28). An accurate photometric analysis and first determination of the apsidal motion was published by Clausen et al. (1977). This paper presents new, accurate spectroscopic orbits of the system for determination of the absolute dimensions of the components, and new times of eclipse which allow the determination of the apsidal motion period with much improved accuracy. The F-type visual companion h 5000 B is physically bound to V1647 Sgr. Its uvbyβ indices indicate that it, too, is unevolved and of approximately Hyades chemical composition.

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