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- W1781799757 abstract "While at low redshift metal absorption systems have been convincingly demonstrated to arise in the haloes of rather normal galaxies [1] [2] as suggested by Bahcall & Spitzer [3], much less is known about the nature of metal absorption system at z > 2 [4] [5] [6]. Recently, numerical simulations performed with GRAPESPH [7] and CLOUDY [8] and assuming a cold dark matter cosmogony were used to show that the prominent complex Civ absorption features observed at high redshift can be well reproduced by the absorbing properties of regions in which galaxies form by hierarchical merging [9] (see Navarro & Steinmetz [10] for more numerical details of the simulation and Rauch, Haehnelt & Steinmetz [11] for a detailed description of their metal absorption properties). The two-point correlation function (TPCF) is one of the standard tools to study the clustering properties of the matter distribution and the TPCF of galaxies and galaxy clusters has been instrumental in establishing the gravitational instability picture and hierarchical models of structure formation. Results on the TPCF of QSO absorption systems, however, have been inconclusive and contradictory. While metal absorption systems at high redshift show strong correlations on scales of several hundred km s-1 and are still weakly correlated on scales of several thousand km s-1[4][12], only very weak or no correlations were reported for Lyα absorption systems even on very small scales [13][14][15]. Cristiani et al. [16], however, were able to demonstrate a relation between correlation strength and Lyα column density. Here some results concerning the correlation properties of CIV absorption systems in our numerical simulations are presented.KeywordsAbsorption SystemColumn DensityGalaxy ClusterHigh RedshiftGravitational InstabilityThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves." @default.
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- W1781799757 date "1998-01-01" @default.
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- W1781799757 title "Probing Small-and Large-Scale Structure at High Redshift with the TPCF of CIV Absorption Lines" @default.
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- W1781799757 doi "https://doi.org/10.1007/978-94-011-4960-0_21" @default.
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