A Smoking Gun for Planetesimal Formation: Charge Driven Growth into a New Size Range
Jens Teiser,
Maximilian Kruss,
Felix Jungmann
et al.
Abstract:Collisions electrically charge grains which promotes growth by coagulation. We present aggregation experiments with three large ensembles of basalt beads (150 µm − 180 µm), two of which are charged, while one remains almost neutral as control system. In microgravity experiments, free collisions within these samples are induced with moderate collision velocities (0 − 0.2 m s −1 ). In the control system, coagulation stops at (sub-)mm size while the charged grains continue to grow. A maximum agglomerate size of 5… Show more
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