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Published December 1, 2001 | Accepted Version + Published
Journal Article Open

Galactosynthesis predictions at high redshift


We predict the Tully–Fisher (TF) and surface-brightness–magnitude relations for disc galaxies at z = 3 and discuss the origin of these scaling relations and their scatter. We find that both halo dynamics and the star formation history play important roles, and we show that the variation of the TF relation with redshift can be a potentially powerful discriminator of galaxy-formation models. In particular, the TF relation at high redshift might be used to break parameter degeneracies among galactosynthesis models at z = 0, as well as to constrain the redshift distribution of collapsing dark-matter haloes, the star formation history and baryon fraction in the disc and the distribution of halo spins.

Additional Information

© 2001 RAS. Received: 08 August 2001. Accepted: 08 August 2001. Published: 01 December 2001. We wish to acknowledge C. C. Steidel and K. A. Adelberger for helpful discussions. We also wish to thank the referee, Vladimir A. Avila–Reese, for useful suggestions and comments, specially regarding the M/L ratios of the model. This work was supported by grants NSF-AST-0096023, NSF-AST-9900866, NSF-AST-9618537, NASA NAG5-8506, and DoE DE-FG03-92-ER40701.

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