1999A&A...341..709L


Query : 1999A&A...341..709L

1999A&A...341..709L - Astronomy and Astrophysics, volume 341, 709-724 (1999/1-3)

Chemically consistent evolution of galaxies. Spiral galaxy models compared to DLA systems.

LINDNER U., FRITZE-v.ALVENSLEBEN U. and FRICKE K.J.

Abstract (from CDS):

We have extended our chemical and cosmological galaxy evolution model to calculate the abundance evolution for altogether 16 different elements in spiral galaxies in a chemically consistent way which is a considerable step towards a more realistic galaxy modeling. All observed element abundances in DLA systems have been compiled. The comparison with our model calculations yields the following results. Together with the fact that our models well reproduce observed average HII region abundances in all spiral types the conformity between observed and calculated abundances over the redshift range from z∼4.5 through z∼0.4 indicates that DLA galaxies may well evolve into the full range of present-day spiral galaxies from Sa through Sd. Comparison of our chemically consistent models with models using only solar metallicity input physics shows that differences in the redshift evolution are small for some elements but large for others. For those elements with large differences the chemically consistent models provide significant better agreement with observed DLA abundances. For typical spiral galaxies the star formation histories of our models clearly bridge the gap between high redshift DLA systems and the nearby spiral galaxy population. The slow redshift evolution of DLA abundances is understood in terms of the long star formation timescales in galactic and proto-galactic disks. The large scatter of observed abundances in DLAs of similar redshift is rather explained by the range of SFRs among early and late type spirals. Towards lower redshift z≤1.5 our models indicate that early type spirals drop out of the DLA samples as their gas content falls below ∼50%. Implications for optical identification are discussed.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: quasars: absorption lines

VizieR on-line data: <Available at CDS (J/A+A/341/709): table5.dat table6.dat table7.dat table8.dat table9.dat tables.ps>

CDS comments: T.4: QSO 2206-199 = QSO 2206-199A

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 7C 020156.39+363507.00 QSO 02 04 55.5959081688 +36 49 17.992097868     18.1     ~ 116 1
2 QSO B0216+0803 QSO 02 18 57.3582544488 +08 17 27.346030260     18.1     ~ 89 0
3 QSO B0454+0356 QSO 04 56 47.1747907776 +04 00 52.946102484   16.76 16.53 16.26   ~ 234 1
4 QSO B0528-2505 QSO 05 30 07.9627395840 -25 03 29.900044512   18.17 17.34 17.7   ~ 409 0
5 4C -02.55 QSO 12 32 00.0159535440 -02 24 04.793069304   17.41 17.06 16.4   ~ 401 1
6 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4075 2
7 LBQS 2206-1958A QSO 22 08 52.0729138920 -19 43 59.866776948   17.49 17.33     ~ 209 0

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2022.06.26-07:50:14

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