Lecturer: Frank van den Bosch, Yale University
Abstract:
In our LCDM paradigm, galaxies form and reside in dark matter halos.
Establishing the (statistical) relation between galaxies and dark
matter halos, the `Galaxy-Halo connection', therefore gives important
insight into galaxy formation, and also is a gateway to using the
distribution of galaxies to constrain cosmological parameters. After a
brief introduction to how clustering and gravitational lensing can be
used to constrain the galaxy-halo connection, I show that several
independent analyses all point towards a significant tension in
cosmological parameters compared to the recent CMB results from the
Planck satellite. I discuss the potential impact of assembly bias, and
present satellite kinematics as a complementary and competitive method
to constrain the galaxy-halo connection. After a brief historical
overview of the use of satellite kinematics, I present two new
analyses, and show how they can be used to improve our knowledge of
the galaxy-halo connection.