Modelling galaxy clustering at high redshift

Details Modelling galaxy clustering at high redshift Modelling galaxy clustering at high redshift

2000-02-11

arxiv.org/abs/astro-ph/0002250v1

Astronomy and Astrophysics

Astrophysics

5 pages, LaTeX, contribution to the 'Clustering at high redshift' meeting in Marseille, summer 1999

Scientific paper

Most phenomenological galaxy formation models show a discrepancy between the predicted Tully-Fisher relation and the luminosity function. We show that this is mainly due to overmerging of galaxy haloes, which is inherent in both the Press-Schechter formalism and dissipationless N-body simulations. This overmerging problem be circumvented by including a specific galaxy halo formation recipe into an otherwise standard N-body code. Resolving the overmerging also allows us to include models for chemical evolution and starbursts, which improves the match to observational data and renders the modelling more realistic. We use high-redshift clustering data to try and distinguish models which predict similar results at low redshifts for different sets of parameters.

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