  We theoretically investigate the role of multiple impurity atoms on the
ground state properties of Bose polarons. The Bogoliubov approximation is
applied for the description of the condensate resulting in a Hamiltonian
containing terms beyond the Fr\"ohlich approximation. The many-body nature of
the impurity atoms is taken into account by extending the many-body description
for multiple Fr\"ohlich polarons, revealing the static structure factor of the
impurities as the key quantity. Within this formalism various experimentally
accessible polaronic properties are calculated such as the energy and the
effective mass. These results are examined for system parameters corresponding
to two recent experimental realizations of the Bose polaron, one with fermionic
impurities and one with bosonic impurities.
