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A Spectroscopic Search for Duplicity Among a Complete Sample of Northern Galactic Wolf-Rayet Stars

Published online by Cambridge University Press:  14 August 2015

R. Lamontagne  and
A.F.J. Moffat
R. Lamontagne
Affiliation:
Département de physique, Université de Montréal and Observatoire astronomique du mont Mégantic
A.F.J. Moffat
Affiliation:
Département de physique, Université de Montréal and Observatoire astronomique du mont Mégantic

Abstract

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We have analysed new spectroscopic observations of 22 population I WR stars in a sample defined by b<12.5 mag, 18h<α<6h, δ > −30°. This completes the search for orbital duplicity among all of the 30 pop I WR stars contained within these limits. We thus have an unbiased data base in a volume segment bounded by a distance of 3–4 kpc for WNE and WC stars , and 4–5 kpc for WNL stars Although more observations are still needed in some cases, we have found several new binary systems. Some of these are low-amplitude, single-line binaries, often with runaway velocities and/or large separations from the galactic plane. We consider them to be candidates for a WR + collapsar stage, as originally predicted by Tutukov and Yungelson (1973) and de Loore and De Grève (1975).

Type
SESSION 4 — OBSERVATIONS OF WOLF-RAYET BINARIES
Information
Symposium - International Astronomical Union , Volume 99: Wolf-Rayet Stars: Observations, Physics, Evolution , 1982 , pp. 283 - 287
Copyright
Copyright © Reidel 1982 

References

Conti, P.S., Niemela, V.S., Walborn, N.R. 1979, Ap. J., 228, 206.Google Scholar
de Loore, C., De Grève, J.P. 1975, Ap. Sp. Sci., 35, 241.Google Scholar
de Loore, C. 1981, IAU Colloq. No. 59, Effects of Mass Loss on Stellar Evolution , eds Chiosi, C. & Stallio, R., Reidel, Dordrecht.Google Scholar
de Loore, C. 1982, this symposium.Google Scholar
Garmany, C.D., Conti, P.S., Massey, P. 1980, Ap. J., 242, 1063.Google Scholar
Hidayat, B., Supelli, K., van der Hucht, K.A. 1981, preprint.Google Scholar
Massey, P. 1980a, Ap. J., 242, 638.Google Scholar
Massey, P. 1980b, Doctoral Thesis, Univ. of Colorado.Google Scholar
Massey, P. 1981, Ap. J., 246, 153.Google Scholar
Moffat, A.F.J. 1978, A. & Ap., 68, 41.Google Scholar
Moffat, A.F.J., Seggewiss, W. 1978, A & Ap., 70, 69.Google Scholar
Tutukov, A.V., Yungelson, L.R. 1973, Nauchn. Inform., 27, 3, 58, 70, 86.Google Scholar
van der Hucht, K.A., Conti, P.S., Lundström, I., Stenholm, B. 1981, Space Sci. Rev., 28, 227.Google Scholar