  In this paper, we will continue to study the model of black holes coupled to
the radial flows of dark matter (RDM-stars). According to recent studies, this
model well describes the experimental Rotation Curves (RCs) of spiral galaxies,
also, RDM-stars can produce signals with the characteristics of Fast Radio
Bursts (FRBs). In this paper, we will perform a combined analysis of
experimental data on RCs and FRBs, which will allow to constrain tighter
parameters of the model. We will also show that within the framework of the
model, the Tully-Fisher relation with a slope of $ \beta = 3-4 $ can be
obtained. Further, several particular solutions will be considered: tachyonic
oven -- a solution in which the incoming flow of tachyons turns into an
outgoing flow of massive particles; shell condensate -- a naked singularity of
negative mass covered by a thin shell of positive mass, so that the
Schwarzschild solution of negative mass inside is joined to one of positive
mass outside; also, an RDM solution with a cosmological constant will be
considered. Further, in the model under consideration, Penrose diagrams will be
constructed, which share common features with Schwarzschild solutions of
positive and negative mass, whose combination the model is. The mechanism of
effective formation of negative masses in the model is discussed, which is
activated when the density of the central core exceeds the Planck value,
similarly to the previously studied quantum bounce effect.
