Formation of prolate cosmic spherule

Abstract

We calculated numerically the motion and the temperature of the dust entering into the atmosphere to evaluate the magnitude of the ram pressure acting on the dust particle when it solidifies. Then we take into account the decrement of the size by evaporation. Furthermore we obtained an analytic solution for the shape of the molten particle and quantified the magnitude of the dust particle's deformation. As a result, it seems highly likely that some dust particles that have proper entry parameters form prolate cosmic spherules.
We compared the magnitude of the deformation of the dust particles calculated in this study with that of the collected cosmic spherules. Then we could explain the magnitude of the deformation of collected cosmic spherule.