Non-monotonic spatial distribution of the interstellar dust in astrospheres: finite gyroradius effect

摘要: High-resolution mid-infrared observations of astrospheres show that many them have filamentary (cirrus-like) structure. Using numerical models dust dynamics in astrospheres, we suggest their structure might be related to specific spatial distribution the interstellar around stars, caused by a gyrorotation charged grains magnetic filed. Our model describes under an influence Lorentz force and assumption constant charge. Calculations are performed for with different sizes separately. It is shown non-monotonic (viewed as filaments) appears period gyromotion comparable characteristic time scale motion astrosphere. Numerical modelling demonstrates number filaments depends on charge-to-mass ratio dust.