Mathematics – Logic
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..783..381k&link_type=abstract
THE EVOLUTION OF STARBURSTS: The 331st Wilhelm and Else Heraeus Seminar. AIP Conference Proceedings, Volume 783, pp. 381-393 (2
Mathematics
Logic
2
Star Formation, Red Shift, Galaxies, Origin, Formation, Evolution, Age, And Star Formation, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Chemical Composition And Chemical Evolution
Scientific paper
I review the observational characteristics of intermediate-to-high redshift star forming galaxies, including their star formation rates, dust extinctions, ISM kinematics, and their chemical compositions. I present evidence that the mean rate of metal enrichment, ΔZ/Δz, from z = 0 - 3, as determined from nebular oxygen abundance measurements in star forming galaxies, is 0.15 dex per redshift unit for galaxies more luminous than MB = -20.5. This rate of chemical enrichment is consistent with the chemical rise in Galactic disk stars. It is less dramatic than, but perhaps consistent with the rate of 0.18 - 0.26 +/- 0.07 dex per redshift unit seen in Damped Ly α systems, and much less than predicted by many cosmological evolution models. The high-redshift galaxies observed to date are the most luminous examples from those epochs, and thus trace only the greatest cosmological overdensities. Star formation in the first 1 - 2 Gyr appears sufficient to elevate ambient metallicities to near or above the solar value, implying efficient retention of metals in these densest environments.
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