Absolute dimensions and masses of eclipsing binaries. V - IQ Persei

Details Absolute dimensions and masses of eclipsing binaries. V - IQ Persei Absolute dimensions and masses of eclipsing binaries. V - IQ Persei

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...295..569l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 295, Aug. 15, 1985, p. 569-579. NSF-supported research.

Astronomy and Astrophysics

Astrophysics

25

Eclipsing Binary Stars, Stellar Mass, Variable Stars, Astrometry, Astronomical Photometry, Astronomical Spectroscopy, Light Curve, Radial Velocity, Stellar Color, Stellar Magnitude, Stellar Orbits

Scientific paper

New photometric and spectroscopic observations of the 1.7 day eclipsing binary IQ Persei (B8 + A6) have been analyzed to yield very accurate fundamental properties of the system. Reticon spectroscopic observations obtained at McDonald Observatory were used to determine accurate radial velocities of both stars in this slightly eccentric large light-ratio binary. A new set of VR light curves obtained at McDonald Observatory were analyzed by synthesis techniques, and previously published UBV light curves were reanalyzed to yield accurate photometric orbits. Orbital parameters derived from both sets of photometric observations are in excellent agreement. The absolute dimensions, masses, luminosities, and apsidal motion period (140 yr) derived from these observations agree well with the predictions of theoretical stellar evolution models. The A6 secondary is still very close to the zero-age main sequence. The B8 primary is about one-third of the way through its main-sequence evolution.

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