Electron acceleration at coronal and interplanetary shock waves

Coronal mass ejections and/or hares are able to generate shock waves travelling through the solar corona and entering the interplanetary space in some cases. These shock waves manifest themselves in solar and interplanetary type II radio bursts. But other shock waves, e.g. planetary bow shocks and the heliospheric termination shock, are also emitting radio radiation. This property of shock waves indicates that they must be able to accelerate electrons up to suprathermal velocities. Extra-terrestrial in-situ measurements of plasma waves at interplanetary shocks show that both quasi-perpendicular and quasi-parallel shocks can produce suprathermal electrons. Different acceleration mechanisms acting at quasi-perpendicular and quasi-parallel shock waves are presented and, subsequently, compared in an quantitative manner.