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An Optical Study of Southern Be Stars*

Published online by Cambridge University Press:  23 September 2016

F. Giovannelli ,
C. Rossi  and
A. A. Vittone
F. Giovannelli
Affiliation:
Istituto di Astrofisica Spaziale, CNR, Frascati, Italy
C. Rossi
Affiliation:
Istituto Astronomico, Universita' La Sapienza, Roma, Italy
A. A. Vittone
Affiliation:
Osservatorio Astronomico di Capodimonte, Napoli, Italy

Extract

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Within the framework of a coordinated campaign of observations in optical and IR of a sample of 21 southern Be stars, we report some results from spectra taken at ESO La Silla Observatory with 1.5m telescope equipped with IDS and the Boller & Chivens grating spectrograph used at 220 A/mm reciprocal dispersion. The spectra, taken in March 1985, range from about 4250 to 7000 A. The equivalent widths of the Balmer lines, either in emission or in absorption, have been computed. Fig. 1 shows the relationship between the logarithm of the absolute value of the Hα, Hγ equivalent widths ratio and the logarithm of the luminosity of the stars in solar units.

Type
III. The Circumstellar Gas
Information
International Astronomical Union Colloquium , Volume 92: Physics of Be Stars , August 1987 , pp. 217 - 218
Copyright
Copyright © Cambridge University Press 1987

Footnotes

*

Based on observations made at the European Southern Observatory (ESO) at La Silla, Chile.

References

Bartolini, C., et al.: 1986, this Colloquium,Google Scholar
de Loore, C., et al.: 1984, Astron. Astrophys. 141, 279.Google Scholar
Guarnieri, A., et al.: 1985, in Multifrequency Behaviour of Galactic Accreting Sources, Giovannelli, F. (ed.), Siderea, Roma, p. 318.Google Scholar
Persi, P., Ferrari-Toniolo, M.: 1986, this Colloquium.Google Scholar