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Interstellar dust (ISD) penetrates into the heliosphere due to the relativemotion of the Sun and the local interstellar medium (LISM). Inside theheliosphere and at the boundaries, where solar wind interacts with the LISM,distribution of ISD is modified due to the action of the electromagneticforces, the solar gravitation and the radiation pressure. These forces make thedistribution of the ISD particles in the heliosphere inhomogeneous. In previouswork we demonstrated the existence of singularities in the ISD densitydistribution at 0.03 - 10 a.u. north and south with respect to the heliosphericcurrent sheet. In this paper we show that dispersion in the ISD velocitydistribution strongly affects the singularities. Even small values ofdispersion have the drastic impact on the density distribution and smooth thehigh density layers discovered previously.

Effects of dispersion of the dust velocity in the LISM on the interstellar dust distribution inside the heliosphere