Max Tegmark's library: r
Figure 1: These four galaxy subsets cannot all trace
the same matter distribution - not even if you allow different bias factors.
Please click here to get the postscript file with
the paper. Here's viewgraphs with fig 1 and fig
2 (color) - you can also click on the images. Click
if you are interested in other research of mine.
Observational evidence for stochastic biasing
Max Tegmark & Ben
We show that the galaxy density in the Las
Campanas Redshift Survey (LCRS) cannot be perfectly correlated with
the underlying mass distribution since various galaxy subpopulations are
not perfectly correlated with each other, even taking shot noise into account.
This rules out the hypothesis of simple linear biasing, and suggests that
the recently proposed stochastic biasing framework is necessary for modeling
astro-ph/9809324, accepted for publication in ApJL
Figure 2: A generalized chi2-test shows that weighted differences
of the maps of figure 1 are inconsistent with mere shot noise.
This is my third paper in a series about stochastic bias - the other two
Return to my home page
This page was last modified April 17, 1999.