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Synthetic spectra of young starbursts: exploring the metallicity dependence

Published online by Cambridge University Press:  25 May 2016

A. de Koter ,
S.R. Heap ,
D.J. Hillier  and
D. I. Hubeny
A. de Koter
Affiliation:
Astronomical Institute Anton Pannekoek, University of Amsterdam, Kruislaan 403, NL-1098 SJ, Amsterdam, the Netherlands
S.R. Heap
Affiliation:
Laboratory for Astronomy and Solar Physics, Code 681, Goddard Space Flight Center, Greenbelt, MD 20771, USA
D.J. Hillier
Affiliation:
Department of Physics and Astronomy, University of Pittsburgh, PA 15260, USA
D. I. Hubeny
Affiliation:
AURA, National Optical Astronomy Observatories, Code 681, Goddard Space Flight Center, Greenbelt, MD 20771, USA

Abstract

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We present first results of fully synthetic UV spectra of young starbursts. With this we mean that the spectra used to model the OB and WN stars result from unified non-LTE model atmospheres, in which stellar winds are accounted for. An important aim of this project is to construct meaningful models for young starbursts at low metallicities. We discuss the presence of He II emission as a function of maximum initial mass and age of the burst.

Type
Part 4. Wolf-Rayet stars and other hot massive stars in the Galactic Center and in Local Group giant H II regions (individual stars)
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 485 - 486
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

de Koter, A., Heap, S.R., Hubeny, I. 1998, ApJ 509, 879 Google Scholar
Meynet, G., Maeder, A., Schaller, G., Schaerer, D., Charbonnel, C. 1994, A&AS 103, 97 Google Scholar
Schmutz, W. 1991, in: Crivellari, L., Hubeny, I. & Hummer, D.G. (eds.), Stellar Atmospheres: Beyond Classical Models, NATO ASI Series C-341, 191 Google Scholar