Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.0919h&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #09.19; Bulletin of the American Astronomical Society, Vol. 31, p.1387
Astronomy and Astrophysics
Astronomy
Scientific paper
MS1512-cB58 is an z=2.73 galaxy whose apparent brightness is amplified by 30X due to gravitationally lensing. The restframe far-UV spectrum of cB58 that was obtained by Keck-I/LRIS is ``one of the best ultraviolet spectra of a starburst galaxy obtained at any redshift'' (Pettini et al. 1999, astro-ph/9908007). We have therefore analyzed and modelled the spectrum of this galaxy in order to obtain information about the stellar content of high-redshift galaxies. We find that our model spectrum is a near match to the observed spectrum of cB58 if we assume a constant rate of star formation, a SMC-like metallicity, and a Salpeter IMF extending up to 100 Msun. In our paper, we will present the details of the spectral synthesis (based on both observed and model spectra of OB stars), and we will investigate the reliability of current evolutionary tracks (based on single, non-rotating stars) for interpreting the spectra of star-forming galaxies.
Bouret Jean-Claud
Heap Sally R.
Hubeny Ivan
Lanz Thierry M.
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