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Seismology of southern Be stars

Published online by Cambridge University Press:  26 May 2016

Eduardo Janot-Pacheco  and
Nelson Vani Leister
Eduardo Janot-Pacheco
Affiliation:
Depto. Astronomia, IAG-USP, Brazil
Nelson Vani Leister
Affiliation:
Depto. Astronomia, IAG-USP, Brazil

Extract

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We have started in 1990 a search for moving bumps in the HeI λ 667.8 nm of mainly southern, bright Be stars. The objects of our sample have been selected on the basis of photometric variability (Cuypers et al., 1989). High resolution (R≥ 30,000), high signal-to-noise ratio (S/R≥ 300) spectroscopic observations have been performed at the brazilian Laboratório Nacional de Astrofísica with a CCD camera attached to the coudé spectrograph of the 1.60 m telescope (e.g. Table I). Several hundred spectra have been taken during the last three years. Photometric observations simultaneous with spectroscopy were made on the same site in July 1992 with a two-channel photometer (Stromgren b filter) and a CCD camera (Johnson B filter) installed at two 0.60 m telescopes. The idea is try to disentangle the controversy between NRP and RM models with the help of simultaneous spectroscopy and photometry.

Type
1. Pulsation and Rotation
Information
Symposium - International Astronomical Union , Volume 162: Pulsation, Rotation and Mass Loss in Early-Type Stars , 1994 , pp. 104 - 105
Copyright
Copyright © Kluwer 1994 

References

Cuypers, J., Balona, L.A. and Marang, F.: 1989, A&A 81, 151 Google Scholar
Janot-Pacheco, E., Leister, N.V., Quast, G.R., Torres, C.A.P.C.O.,: 1991, Rapid Variability of OB Stars: Nature and Diagnostic Value, ESO workshop , ed. Baade, D., 45 Google Scholar
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Leister, N.V., Janot-Pacheco, E., Buck, M.T.C., Dias, M.P., Hubert, A.M., Hubert, H., Floquet, M. and Briot, D.: 1993a, this volume ,Google Scholar
Leister, N.V., Janot-Pacheco, E., Hubert, A.M., Hubert, H., Floquet, M. and Briot, D.: 1993b, A&A submited,Google Scholar
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