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Metallicity dependence of starburst spectra

Published online by Cambridge University Press:  25 May 2016

Peeter Traat
Peeter Traat*
Affiliation:
Tartu Observatory, EE2400 Tartu, Estonia

Abstract

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The impact of chemical composition on the spectrum of stellar population formed in the starburst is studied. The range of metallicities Z = 0.0001–0.05–0.1 covers all the compositions observed; depending on age, wavelength region and IMF, the UV-fluxes differ between extreme compositions at least ten-fold or more. Independent of age, UV-fluxes shortwards of the Balmer jump monotonically decline with the growth of metallicity. The optical IR wavelenght region are also influenced, with fluxes at λ > 1 μm differing typically factors 10–50. In the IR the actually brightest emitting composition gets reversed with age.

Type
Part 6. Starbursts in normal and active galaxies: their effects on the ISM and on chemical evolution
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 756 - 757
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Thuan, T.X., Izotov, Y.I., Lipovetsky, V.A. 1997, ApJ 477, 661 Google Scholar
Traat, P. 1996, in: Leitherer, C., Fritze-von Alvensleben, U. & Huchra, J. (eds.), From Stars to Galaxies, The Impact of Stellar Physics on Galaxy Evolution, ASP-CS 98,36 Google Scholar