High-precision elements of double-lined spectroscopic binaries from combined interferometry and spectroscopy. Application to the; Cephei star ; Centauri
2006
Abstract
We derive the component masses and dynamical parallax of ; Centauri with a precision of 6% and 4%, respectively. Modelling allowed us to refine the mass estimates to 1% precision resulting in M_1=10.7 0.1 M_988857; and M_2=10.3 0.1 M_8857;, and to derive the age of the system as being (14.1 0.6) 106 years.
We deduce two oscillation frequencies for the broad-lined primary of 946; Centauri: f_1=7.415 c d-1 and f_2=4.542 c d-1 or one of their aliases. The degrees of these oscillation modes are higher than 2 for both frequencies, irrespective of the alias problem.
No evidence of oscillations in the narrow-lined secondary was found.