1210.0841 (J. -B. Salomon et al.)

A new method based on Markov chains for deriving SB2 orbits directly from their spectra    [PDF]

J. -B. Salomon, R. Ibata, P. Guillout, J. -L. Halbwachs, F. Arenou, B. Famaey, Y. Lebreton, T. Mazeh, D. Pourbaix, L. Tal-Or

We present a new method to derive orbital elements of double-lined spectroscopic binaries (SB2). The aim is to have accurate orbital parameters of a selection of SB2 in order to prepare the exploitation of astrometric Gaia observations. Combined with our results, they should allow one to measure the mass of each star with a precision of better than 1%. The new method presented here consists of using the spectra at all epochs simultaneously to derive the orbital elements without templates. It is based on a Markov chain including a new method for disentangling the spectra.

View original: http://arxiv.org/abs/1210.0841