  This article explores the properties (amplitude and shape) of the angular
power spectrum of the anisotropies of the astrophysical gravitational wave
background (AGWB) focusing on the signatures of the astrophysical models
describing sub-galactic physics. It demonstrates that while some parameters
have negligible impact others, and in particular the stellar evolution models,
the metallicity and the merger time delay distribution can result in relative
differences of order 40% in the angular power spectrum of anisotropies in both
the LIGO/Virgo and LISA frequency bands. It is also shown that the monopole and
the anisotropic components of the AGWB are complementary and sensitive to
different astrophysical parameters. It follows that AGWB anisotropies are a new
observable with the potential to provide new astrophysical information that can
not be accessed otherwise.
