Orateur
Description
The LIGO/Virgo detections of gravitational waves from merging massive black holes
suggest progenitor stars of low metallicity. In this talk I will provide constraints on the formation of the stellar progenitors based on advanced models of galaxy formation and evolution
combined with binary population synthesis models. First I will combine
estimates of galaxy properties (star-forming gas metallicity, star
formation rate and merger rate) across cosmic time to predict the low
redshift BBH merger rate as a function of present day host galaxy
mass, formation redshift of the progenitor system and different
progenitor metallicities. I will show that the signal is dominated by
binaries formed at the peak of star formation in massive galaxies with
and binaries formed recently in dwarf galaxies. Then, I will present
what very high resolution hydrodynamic simulations of different galaxy
types can learn us about their black hole populations.
