The large-scale local bias parameters of dark matter halos are essential to
describe the statistics of halos and galaxies on large scales, as well as for
the halo model of the matter distribution. Using so-called separate universe
simulations, we recently obtained precise measurements of the three leading
bias parameters. For b2 and b3, these are the most precise measurements
to date. We compare our results with bias parameters obtained from two
and three points cross-correlation functions and with theoretical predictions
from the excursion set peaks (ESP) model.
Using the same set of simulations, we further investigate halo assembly bias,
i.e. the dependence of the halo bias on properties other than the halo mass.
We focus on four halo properties : halo concentration, spin, ellipticity and
mass accretion rate. We measure assembly bias for b1 and nd good agree-
ment with previous studies. Furthermore, we present results for assembly
bias in b2 which are among the rst ones and most precise to date. To try
and better understand the physical mechanisms behind assembly bias, we
also look at the joint dependence of bias on two halo properties in addition
to the mass.