Temporal Bias in the Clustering of Massive Cosmological Objects

Details Temporal Bias in the Clustering of Massive Cosmological Objects Temporal Bias in the Clustering of Massive Cosmological Objects

2003-11-05

arxiv.org/abs/astro-ph/0311136v1

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, to appear in "PHYSTAT 2003: Statistical Problems in Particle Physics, Astrophysics, and Cosmology", SLAC,

Scientific paper

It is a well-established fact that massive cosmological objects exhibit a ``geometrical bias'' that boosts their spatial correlations with respect to the underlying mass distribution. Although this geometrical bias is a simple function of mass, this is only half of the story. We show using numerical simulations that objects that are in the midst of accreting material also exhibit a ``temporal bias,'' which further boosts their clustering far above geometrical bias levels. These results may help to resolve a discrepancy between spectroscopic and clustering mass estimates of Lyman Break Galaxies, a population of high-redshift galaxies that are caught in the act of forming large numbers of new stars.

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