Mixed configurations of tensor-multiscalar solitons and neutron stars
Daniela D. Doneva, Stoytcho S. Yazadjiev
Abstract
In the present paper we consider a special classes of massive tensor-multiscalar theories of gravity whose target space metric admits Killing field(s) with a periodic flow. For such tensor-multiscalar theories we show that there exist mixed configurations of tensor-multiscalar solitons and neutron stars. The influence of the curvature of the target space on the structure of the mixed configurations is studied for two explicit tensor-multiscalar theories. The stability of the obtained compact objects is examined and it turns out that the stability region spans to larger central energy densities and central values of the scalar field compared to the pure neutron stars or the pure tensor-multiscalar solitons.