Astrophysics and Space Science

, Volume 205, Issue 1, pp 57–63 | Cite as

Spectroscopic evolutionary synthesis models of Wolf-Rayet galaxies

  • H. Krüger
  • U. Fritze-V. Alvensleben
  • K. J. Fricke
  • H. -H. Loose
Article

Abstract

We present spectroscopic evolutionary synthesis calculations for starburst galaxies of various metallicities in order to model the broad emission lines HeII λ4686 and CIII λ4650 produced by Wolf-Rayet (WR) stars in the spectra of WR galaxies. The strengths of both lines strongly decrease with decreasing metallicity. The presence of WR emission features is a clear indicator of very recent star formation less than 4 to 7 × 106 yr ago. Bursts of duration 1 to 5 × 106 yr which lead to an increase in the total stellar mass in the galaxy by 0.1 to 10 % are compatible with the equivalent width of Hell »4686 observed in WR galaxies.

Keywords

Emission Line Clear Indicator Star Formation Emission Feature Equivalent Width 

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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • H. Krüger
    • 1
  • U. Fritze-V. Alvensleben
    • 1
  • K. J. Fricke
    • 1
  • H. -H. Loose
    • 1
  1. 1.Universitätssternwarte GöttingenGöttingenGermany

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