Distribution of the PDM density around a point mass in a homogeneous external gravitational field. The mass of the point source, located in the center of the coordinate system, is 10¹¹ M_⊙. The external field has the value of 0.02 a₀ and points up. The left and right color scales indicate the positive and negative densities of PDM, respectively. The dotted half-circle marks the theoretical estimate of the radius r_ef below which the effects of the external field are negligible.