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Spectroscopic CCD Search for the Unseen Companions in Three Single-Line WNL Binaries

Published online by Cambridge University Press:  03 August 2017

Andre Grandchamps  and
Anthony F. J. Moffat
Andre Grandchamps
Affiliation:
Département de physique, Université de Montréal, Montréal and Observatoire du mont - Mégantic
Anthony F. J. Moffat
Affiliation:
Département de physique, Université de Montréal, Montréal and Observatoire du mont - Mégantic

Extract

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We have obtained some 15 CCD spectra at different orbital phases for each of the SBl systems HD193928 (WN6), HD197406 (WN7), and CQ Cep (WN7), in an attempt to detect the companion, determine its orbit and estimate the masses. The wavelength range of the spectra is λλ3600 - 4200Å, with 1.4Å/pixel and < S/N > ≈ 100/pixel. We compare the best emission-line (N IV λ4058Å) with the best absorption-line (H9 λ3835Å).

Type
Session IV. Binaries
Information
Symposium - International Astronomical Union , Volume 143: Wolf–Rayet Stars and Interrelations with other Massive Stars in Galaxies , 1991 , pp. 258
Copyright
Copyright © Kluwer 1991