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We present orbital parameters for six double-lined spectroscopic binaries(iota Pegasi, omega Draconis, 12 Bootis, V1143 Cygni, beta Aurigae, and MizarA) and two double-lined triple star systems (kappa Pegasi and eta Virginis).The orbital fits are based upon high-precision radial velocity observationsmade with a dispersed Fourier Transform Spectrograph, or dFTS, a new instrumentwhich combines interferometric and dispersive elements. For some of thedouble-lined binaries with known inclination angles, the quality of our RV datapermits us to determine the masses M_1 and M_2 of the stellar components withrelative errors as small as 0.2%.

Stellar Astrophysics with a Dispersed Fourier Transform Spectrograph. II. Orbits of Double-lined Spectroscopic Binaries