The Galaxy-Dark Matter Connection
Frank van den Bosch (ETH Zurich ) - 15 Aug at 12:00 noon
I present a new statistical method to link galaxies to their dark
matter haloes. I show how the galaxy-dark matter connection thus
established can be used to (i) constrain both galaxy formation and
cosmology and (ii) construct detailed mock galaxy redshift surveys.
In particular, I show how pairwise peculiar velocity dispersions and
cluster mass-to-light ratios require a relatively low value for the
power-spectrum normalization parameter, sigma_8, and demonstrate that
there are two characteristic scales in galaxy formation. I also
present results from large catalogues of galaxy groups selected from
the 2dFGRS and SDSS with a new, halo-based group finder. In will use
these to argue that, contrary to common wisdom, galaxy properties do
not depend on environment or luminosity, but only on the mass of the
halo in which they reside.
The seminar will be held in 544 Campbell Hall.
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