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Long period sdB + MS binaries with Mercator
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Long period sdB + MS binaries with Mercator
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The predicted orbital period distribution of the subdwarf-B (sdB) population is bi-modal with a peak at short (< 10 days) and long (> 250 days) periods. Observationally, many short-period sdB systems are indeed known. The predicted long period peak is missing and orbits have only been determined for a few long-period systems. As these predictions are based on poorly understood binary-interaction processes, it is of prime importance to confront the predictions to well-constrained observational data. We therefore initiated a monitoring program to find and characterize long-period sdB stars with the 1.2 m Mercator telescope. Here we present the results of this program.
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Cited by 1 Pith paper
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Toward 3D orbits of wide sdO/B binaries I. Six composite systems spatially resolved with VLTI/GRAVITY
VLTI/GRAVITY spatially resolved six wide sdO/B+MS binaries, yielding 1-8% precise projected separations of 1-3 au — the first interferometric sample toward 3D orbits and model-independent masses.
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