On the momentum transfer of the solar wind to the Martian topside ionosphere

摘要: Hot plasma measurements from the Soviet Phobos-2 spacecraft in Martian magnetosphere suggests that solar wind interaction with Mars is cometary-like, mass loading of and ion pick-up occuring also outside subsolar bow-shock. The characterized by a pronounced decrease speed inside what has been termed mass-loading boundary (MLB). Well MLB, process acts normal sense. There ions pick up approximately velocity - independent mass. Inside momentum loss more heavy origin taking most maximum flux. innermost part layer (near magnetopause) leads to loaded pick-up. can be understood as internal an MHD-dynamo, propelled driver wind. ASPERA composition data consistent such process. magnetopause are accelerated energies close those protons. authors propose two types ofmore » acceleration processes, one similar acting within Earth's auroral region (acting presence ambient magnetic field), another limited spatial region.« less