Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of bias in different cosmological models   We study the evolution of the halo-halo correlation function and bias in four
cosmological models (LCDM, OCDM, tauCDM, and SCDM) using very high-resolution
N-body simulations. The high force and mass resolution allows dark matter (DM)
halos to survive in the tidal fields of high-density regions and thus prevents
the ambiguities related with the ``overmerging problem.'' This allows us to
estimate for the first time the evolution of the correlation function and bias
at small (down to ~100/h kpc) scales. We find that at all epochs the 2-point
correlation function of galaxy-size halos xi_hh is well approximated by a
power-law with slope ~1.6-1.8. The difference between the shape of xi_hh and
the shape of the correlation function of matter results in the scale-dependent
bias at scales <7/h Mpc, which we find to be a generic prediction of the
hierarchical models. The bias evolves rapidly from a high value of ~2-5 at
z~3-7 to the anti-bias of b~0.5-1 at small <5/h Mpc scales at z=0. We find that
our results agree well with existing clustering data at different redshifts.
Particularly, we find an excellent agreement in both slope and the amplitude
between xi_hh(z=0) in our LCDM simulation and the galaxy correlation function
measured using the APM galaxy survey. At high redshifts, the observed
clustering of the Lyman-break galaxies is also well reproduced by the models.
The agreement with the data at high and low z indicates the general success of
the hierarchical models of structure formation in which galaxies form inside
the host DM halos. (Abridged)

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The categories of this paper are: q-bio
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The categories of this paper are: stat
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
25
The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas