Abstract
We report on the results of a binary survey in the outer parts of the Orion Nebula Cluster, 0.7 to 2 pc from the cluster center. The results should help to decide if the binary formation rate was lower in Orion than in Taurus-Auriga, or if many binaries formed initially, but were destroyed in close stellar encounters. We find that the binary frequency of low-mass stars does not depend on the distance to the cluster center. The companion star frequency of intermediate- to high-mass stars shows a trend to decrease with cluster radius, but the statistical significance of this trend is rather weak.
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Köhler, R., Petr-Gotzens, M.G., McCaughrean, M., Bouvier, J., Duchêne, G., Quirrenbach, A. An Adaptive Optics Search for Binaries in the Orion Nebula Cluster. In: Brandner, W., Kasper, M.E. (eds) Science with Adaptive Optics. ESO Astrophysics Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10828557_32
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DOI: https://doi.org/10.1007/10828557_32
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-25034-0
Online ISBN: 978-3-540-31605-3
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