Two ways of biasing galaxy formation
We calculate the galaxy bispectrum in both real and redshift space, adopting the most common prescriptions for local Eulerian biasing and the Lagrangian evolving-bias model. We show that the two biasing schemes make measurably different predictions for these clustering statistics. The Eulerian prescription implies that the galaxy distribution depends only on the present-day local mass distribution, while its Lagrangian counterpart relates the current galaxy distribution to the mass distribution at an earlier epoch when galaxies first formed. Detailed measurement of the galaxy bispectrum (of its reduced amplitude) can help establish whether galaxy positions are determined by the current mass distribution or an earlier mass distribution.
Additional Information© 2000 RAS. Accepted 2000 September 14. Received 2000 August 27; in original form 2000 April 14. We thank Sabino Matarrese for discussions. The anonymous referee improved the presentation of these results. CP is supported by a Golda Meir Fellowship. This work was supported at Caltech in part by the DoE, NSF and NASA.
Published - 318-3-L39.pdf
Accepted Version - 0005544.pdf