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Astrometric binaries with a variable component

Astrometric binaries with a variable component J.-L. Halbwachs (Strasbourg Obs.), D. Pourbaix (IAA / Univ. libre de Bruxelles). SIMULATED DATA FOR VIM Cepheid : Pvar = 7 days period; 13 0.5 mag. Companion: 13 mag, 200 UA away  x = 40 as ;  mag = 0.001 mag.

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Astrometric binaries with a variable component

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  1. Astrometric binaries with a variable component J.-L. Halbwachs (Strasbourg Obs.), D. Pourbaix (IAA / Univ. libre de Bruxelles) SIMULATED DATA FOR VIM Cepheid : Pvar = 7 days period; 13 0.5 mag. Companion: 13 mag, 200 UA away x = 40 as ; mag = 0.001 mag. SIMULATION VERSUS SOLUTION

  2. ORBITAL ASTROMETRIC BINARIES WITH A VARIABLE COMPONENT • g = (1 + q)  10 -0.4 m 2 / q (q = M2/M1) • a1 • APPLICATION TO SIMULATED DATA • W UMa eclipsing binary; m = 12.8  0.55 • F8 V , m= 12.6. P = 1600 days.

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