Absolute dimensions of early-type eclipsing binary stars. III - U Ophiuchi

Details Absolute dimensions of early-type eclipsing binary stars. III - U Ophiuchi Absolute dimensions of early-type eclipsing binary stars. III - U Ophiuchi

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...248..129h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 248, no. 1, Aug. 1991, p. 129-138. Research supported by NSERC.

Astronomy and Astrophysics

Astrophysics

13

Early Stars, Eclipsing Binary Stars, Light Curve, Stellar Structure, Radial Velocity, Stellar Evolution, Stellar Spectra, Stellar Spectrophotometry

Scientific paper

Absolute dimensions are derived for U Ophiuchi through a combination of new spectroscopic data and extant multicolor light curves. A true light ratio of 1.5 + or - 0.2 is obtained, together with a secondary spectral type of B5V. Solution of the lightcurve data show that the mean primary and secondary T(eff) are 16,900 + or - 1500 K and 16,000 + or - 1500 K, respectively. All light curve solutions show the hotter, more massive star to be the more luminous one, as indicated by Popper (1978). Placement of the star's components on theoretical HR diagrams indicates a system age of 63 million years.

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