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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 308643.0, MPI für Astronomie / Publikationen_mpia
Medium-resolution spectroscopy of galaxies with redshifts 2.3 < z < 3.5
Authors:Mehlert, D.; Tapken, C.; Appenzeller, I.; Noll, S.; de Mello, D.; Heckman, T. M.
Date of Publication (YYYY-MM-DD):2006
Journal Abbrev.:Astronomy and Astrophysics
Volume:455
Start Page:835
End Page:843
Audience:Not Specified
Abstract / Description:Using FORS2 at the ESO VLT we obtained medium-resolution (R ≈ 2000) spectra of 12 galaxies with 2.37 &leq; z &leq; 3.40 in the FORS Deep Field. Two individual spectra with good S/N and a composite of all 12 spectra were used to derive properties of the stellar and interstellar absorption lines of galaxies in this redshift range. Systematic differences between the individual spectra were found for the strength and profiles of the intrinsic interstellar lines. For eight spectra with sufficient S/N, we measured the "1370" and "1425" metallicity indices, from which we find for our sample that galaxies at z > 3 have lower mean metallicity than galaxies at 2.3 < z < 3. However uncertainties remain concerning the absolute calibration of the metallicity tracers in use for high-redshift galaxies. Additional modeling will be needed to resolve these uncertainties.
Free Keywords:galaxies: high-redshift; galaxies: starburst; galaxies: abundances; galaxies: evolution
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi...
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