Absolute Properties of the Eclipsing Binary Star V459 Cassiopeiae

Details Absolute Properties of the Eclipsing Binary Star V459 Cassiopeiae Absolute Properties of the Eclipsing Binary Star V459 Cassiopeiae

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aj....128.1340l&link_type=abstract

The Astronomical Journal, Volume 128, Issue 3, pp. 1340-1347.

Astronomy and Astrophysics

Astronomy

13

Stars: Binaries: Eclipsing, Stars: Binaries: Spectroscopic, Stars: Evolution, Stars: Fundamental Parameters, Stars: Individual (V459 Cassiopeiae)

Scientific paper

We present 5064 differential observations in the V filter measured by a robotic telescope, as well as 30 pairs of radial velocities from high-resolution spectroscopic observations, of the detached, EA-type, 8.46 day period double-lined eclipsing binary star V459 Cas. Absolute dimensions of the components are determined with good precision (better than 1.6% in the masses and radii) for the purpose of testing various aspects of theoretical modeling. We obtain 2.02+/-0.03 Msolar and 2.009+/-0.013 Rsolar for the hotter, larger, more massive and more luminous photometric primary (star A), and 1.96+/-0.03 Msolar and 1.965+/-0.013 Rsolar for the cooler, smaller, less massive and less luminous photometric secondary (star B). The effective temperatures and interstellar reddening of the stars are accurately determined from uvbyβ photometry: 9140+/-300 K for the primary, 9100+/-300 K for the secondary-corresponding to spectral types of A1-and 0.186 mag for Eb-y. The orbits are eccentric, and spectral line widths give observed rotational velocities that are much faster than synchronous for both components. The components of V459 Cas are main-sequence stars with an age of about 525 Myr according to models.

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