... orbit

Based on observations made with ESO Telescopes at the La Silla Observatory, Chile, under programmes 66.D-0297, 67.D-0023, 68.D-028, and with the Strömgren Automatic Telescope, La Silla.

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...2,

Research Director, Belgian Fund for Scientific Research (FWO).

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...4,5,

Research Associate, Belgian National Fund for Scientific Research (FNRS).

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... abundances

Using the scale $[{\rm X/H}]=\log{(N{\rm (X)}/N{\rm (H)})}_{\rm star}-\log{(N{\rm (X)}/N{\rm (H)})}_\odot$.

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... identified

As described in Hensberge et al. (2004) one may select wavelength bins based on the variance of the time-dependent normalised fluxes at that wavelength with respect to the average spectrum.

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