Abstract
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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.