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Spectroscopic Investigations of Luminous Emission-Line Objects

Published online by Cambridge University Press:  14 August 2015

Angelo Cassatella ,
Roberto Nesci  and
Roberto Viotti
Angelo Cassatella
Affiliation:
Laboratorio di Astrofisica Spaziale, Frascati, Italy
Roberto Nesci
Affiliation:
Laboratorio di Astrofisica Spaziale, Frascati, Italy
Roberto Viotti
Affiliation:
Laboratorio di Astrofisica Spaziale, Frascati, Italy

Abstract

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Emission lines are frequently observed in the spectra of the high luminosity stars, indicating the presence of extended atmospheric envelopes. We are investigating the physical characteristics (differential expansion velocity, density, extension, mass loss) and the origin of these envelopes in relation to the high luminosity of the parent star, and its evolutionary stage. Some results are presented concerning Eta Car, S Dor, HD 34664, P Cyg, AG and HR Car, and two WR stars.

Type
Part 5 / Wolf-Rayet Stars
Information
Symposium - International Astronomical Union , Volume 67: Variable Stars and Stellar Evolution , 1975 , pp. 297 - 298
Copyright
Copyright © Reidel 1975 

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