Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-04-16
Astrophys.Space Sci. 276 (2001) 1007-1014
Astronomy and Astrophysics
Astrophysics
8 pages, using kluwer LaTeX macro, Proceedings "The Evolution of Galaxies on Cosmological Timescales"
Scientific paper
We extend our spiral galaxy models that successfully describe nearby template spectra as well as the redshift evolution of CFRS and HDF spirals to include - in a chemically consistent way - the redshift evolution of a series of individual elements. Comparison with observed DLA abundances shows that DLAs might well be the progenitors of present-day spiral types Sa through Sd. Our models bridge the gap between high redshift DLA and nearby spiral HII region abundances. The slow redshift evolution of DLA abundances is a natural consequence of the long SF timescales for disks, the scatter at any redshift reflects the range of SF timescales from early to late spiral types. We claim that while at high redshift all spiral progenitor types seem to give rise to DLA absorption, towards low redshifts, the early type spirals seem to drop out of DLA samples due to low gas and/or high metal and dust content. Model implications for the spectrophotometric properties of the DLA galaxy population are discussed in the context of campaigns for the optical identifications of DLA galaxies both at low and high redshift.
Alvensleben Uta Fritze--v.
Fricke Klaus J.
Lindner Ulrich
Möller Claudia S.
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