The Stellar Population of High-z Galaxies from Medium-Resolution Spectra in the FORS Deep Field

Details The Stellar Population of High-z Galaxies from Medium-Resolution Spectra in the FORS Deep Field The Stellar Population of High-z Galaxies from Medium-Resolution Spectra in the FORS Deep Field

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329..299m&link_type=abstract

Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

We obtained UV rest-frame spectra of 20 galaxies with 2.37 ≤ z ≤ 3.40 in the FORS Deep Field, using FORS2 at the ESO VLT. The spectral resolution of R ≈ 2000 allows us to measure the purely photospheric indices ``1370'' and ``1425'' (Leitherer et al. 2001). These indices are good metallicity indicators, unaffected by the starburst age or interstellar absorption lines. We measure an increase of both indices with decreasing redshift, indicating an increase of the average metallicity of bright starburst galaxies with cosmic time.

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