Spectroscopic evolutionary synthesis models of Wolf-Rayet galaxies

Details Spectroscopic evolutionary synthesis models of Wolf-Rayet galaxies Spectroscopic evolutionary synthesis models of Wolf-Rayet galaxies

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.205...57k&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 205, no. 1, p. 57-63.

Astronomy and Astrophysics

Astrophysics

1

Astronomical Models, Astronomical Spectroscopy, Galactic Evolution, Wolf-Rayet Stars, Active Galactic Nuclei, Massive Stars, Stellar Mass

Scientific paper

We present spectroscopic evolutionary synthesis calculations for starburst galaxies of various metallicities in order to model the broad emission lines He II 4686 and C III 4650 produced by 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 x 10 exp 6 yr ago. Bursts of duration 1 to 5 x 10 exp 6 yr which lead to an increase in the total stellar mass in the galaxy by 0.1 to 10 percent are compatible with the equivalent width of He II 4686 observed in WR galaxies.

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