Speaker
Kenta Hotokezaka
Description
One of the puzzles in the recent observations of
gravitational waves from binary black hole mergers is their
low aligned spins.
This spin distribution teaches us a lot about the progenitor
scenario. We discuss the implications of the low aligned
spins of the BBH mergers
observed by LIGO to the field binary scenario based on the
tidal synchronization argument. We show Wolf-Rayet
and population III progenitors can be consistent with the
observed spins.
We also show that a fraction of BBH mergers should have high
aligned spins.
