Absolute Properties of the Main-Sequence Eclipsing Binary Star WW Camelopardalis

Details Absolute Properties of the Main-Sequence Eclipsing Binary Star WW Camelopardalis Absolute Properties of the Main-Sequence Eclipsing Binary Star WW Camelopardalis

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aj....123.1013l&link_type=abstract

The Astronomical Journal, Volume 123, Issue 2, pp. 1013-1022.

Astronomy and Astrophysics

Astronomy

31

Stars: Binaries: Eclipsing, Stars: Binaries: Spectroscopic, Stars: Evolution, Stars: Fundamental Parameters, Stars: Individual (Ww Camelopardalis)

Scientific paper

We present absolute photometric observations in uvbyβ and 5759 differential observations in the V filter (the most complete light curve ever obtained) measured by a robotic telescope, as well as radial velocities from spectroscopic observations of the detached, eccentric, 2.3 day, double-lined, eclipsing binary star WW Camelopardalis. Absolute dimensions of the components are determined with high precision (better than 1% in the masses and radii) for the purpose of testing various aspects of theoretical modeling. We obtain 1.920+/-0.013 Msolar and 1.911+/-0.016 Rsolar for the primary, and 1.873+/-0.018 Msolar and 1.808+/-0.014 Rsolar for the secondary. The effective temperatures and interstellar reddening of the stars are accurately determined from new uvbyβ photometry: 8350+/-135 K for the primary and 8240+/-135 K for the secondary, corresponding to a spectral type of A4m for both, and 0.294 mag for Eb-y. The metallic-lined character of the stars is revealed by high-resolution spectroscopy and uvbyβ photometry. Spectral line widths give rotational velocities that are synchronous with the orbital motion in a slightly eccentric orbit (e=0.0098). The components of WW Cam are main-sequence stars with an age of about 490 Myr according to models. Some of the observations reported here were obtained with the Multiple Mirror Telescope, a joint facility of the Smithsonian Institution and the University of Arizona.

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