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Stellar multiplicity across the mass spectrum

Published online by Cambridge University Press:  25 February 2014

R. Chini ,
A. Nasseri ,
T. Dembsky ,
L.-S. Buda ,
K. Fuhrmann  and
H. Lehmann
R. Chini
Affiliation:
Astronomisches Institut, Ruhr-Universität Bochum, Germany Instituto de Astronomía, Universidad Católica del Norte, Antofagasta, Chile
A. Nasseri
Affiliation:
Astronomisches Institut, Ruhr-Universität Bochum, Germany
T. Dembsky
Affiliation:
Astronomisches Institut, Ruhr-Universität Bochum, Germany
L.-S. Buda
Affiliation:
Astronomisches Institut, Ruhr-Universität Bochum, Germany
K. Fuhrmann
Affiliation:
Astronomisches Institut, Ruhr-Universität Bochum, Germany
H. Lehmann
Affiliation:
Thüringer Landessternwarte Tautenburg, Germany
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Abstract

We investigate the multiplicity as a function of stellar mass. For this purpose we have created three complete samples of O, B, and FGK stars and performed multi-epoch, high-resolution (R ∼ 50 000) optical spectroscopy. The current results for the O-type stars suggest a multiplicity fraction of more than 80%. Many O-type systems contain components of similar mass. The multiplicity fraction for B stars seems to decrease from 70% to 20%. We argue that this general decrease is most likely due to observational biases; however, similar-mass systems – like common for O-type stars – seem to vanish toward later B-types. Within the sample of F stars we observe an increasing multiplicity fraction with primary mass (∼50% – 80%); simultaneously there is a decrease of single stars toward the A-type regime. Closer inspection of spectroscopic binaries – either by spectral disentangling or by common proper motion studies – reveals higher-level systems in each mass range.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 64: Setting a New Standard in the Analysis of Binary Stars , 2013 , pp. 155 - 162
Copyright
© EAS, EDP Sciences, 2014

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References

Beck, T.L., Schaefer, G.H., & Simon, M., 2004, ApJ, 614, 235CrossRef
Chen, X, Arce, H.G., Zhang, Q., et al., 2013, ApJ, 768, 110CrossRef
Chini, R., Hoffmeister, V.H., Nasseri, A., et al., 2012, MNRAS, 424, 1925CrossRef
Chini, R., Fuhrmann, K., Barr, A., et al., 2013, MNRAS, in press
Fuhrmann, K., 2011, MNRAS, 414, 2893CrossRef
Fuhrmann, K., Chini, R., Hoffmeister, V.H., et al., 2011, MNRAS, 411, 2311CrossRef
Fuhrmann, K., & Chini, R., 2012, ApJS, 203, 30CrossRef
Kaufer, A., Stahl, O., Tubbesing, S., et al., 1999, Messenger, 95, 8
Kraus, S., Balega, Y.Y., Berger, J.-P., et al., 2007, A&A, 466, 649PubMed
Mason, B.D., Hartkopf, W.I., Gies, D.R., Henry, T.J., & Helsel, J.W., 2009, AJ, 137, 3358CrossRef
Pfeiffer, M.J., Frank, C., Baumüller, D., et al., 1998, A&AS, 130, 381PubMed
Raghavan, D., McAlister, H.A., Henry, T.J., et al., 2010, ApJS, 190, 1CrossRef
Sana, H., & Evans, C.J., 2011, Proc. IAUS, 272, 2011
Sana, H., de Koter, A., de Mink, S.E., et al., 2013, A&A, 550, 107
Schertl, D., Balega, Y.Y., Preibisch, T., et al., 2003, A&A, 402, 267
Sota, A., Maíz-Apellániz, J., Walborn, N.R., et al., 2011, ApJS, 139, 24CrossRef
Walborn, N.R., 1973, AJ, 78, 1067CrossRef