Radial velocity studies and absolute parameters of contact binaries. I - AB Andromedae

Details Radial velocity studies and absolute parameters of contact binaries. I - AB Andromedae Radial velocity studies and absolute parameters of contact binaries. I - AB Andromedae

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335..319h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 335, Dec. 1, 1988, p. 319-330. Research supported by Valparaiso University,

Astronomy and Astrophysics

Astrophysics

32

Eclipsing Binary Stars, Radial Velocity, Stellar Rotation, Cross Correlation, Light Curve, Mass Ratios, Velocity Distribution

Scientific paper

New radial velocity curves have been obtained for the contact binary AB And, using the cross-correlation technique. A mass ratio of 0.479 is determined, which is revised to 0.491 when the velocities are corrected for proximity effects using a light curve model. These values differ by less than ten percent from the photometric mass ratio. An analysis of the symmetric B and V light curves reported by Rigterink in 1973 using the spectroscopic mass ratio yields a consistent set of light and velocity curve elements. These also produce a reasonably good fit to the infrared J and K light curves reported by Jameson and Akinci in 1979. Absolute elements are determined, and these indicate that both components have a main-sequence internal structure. These absolute parameters, together with the Galactic kinematics, suggest an age for the system similar to or greater than that of the Sun.

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