A Possible Cause of Magnetic Anomalies on the Southern Martian Hemisphere

• 作 者: 陈出新
• 机 构: CAS Key Laboratory of Geospace Environment,Department of Geophysics and Planetary Sciences,School of
• 出 处: Chinese Physics Letters
• 发表日期: 2016年08期
• 关键词: circles magnetization crust hemisphere trending topology Cause downward friction

From the topology of a synthetic aurora map,we propose a mechanism for the magnetic anomalies on the southern martian hemisphere,i.e.,impacts by asteroids when the dynamo is active.The quasi concentric circles of aurora suggest that there are two-to-three convectional cells for each impact.The whole synthetic aurora is induced by three major impacts of asteroids.The east-west lineation features of crust magnetizations are due to the east-west trending locations of three impacts.The alternatively changed sign of crust magnetization originates from the alternatively changed Bow direction on the tops of adjacent convectional cells.

From the topology of a synthetic aurora map, we propose a mechanism for the magnetic anomalies on the southern martian hemisphere, ie, impacts by asteroids when the dynamo is active. Quasi concentric circles of aurora suggest that there are two-to-three convectional cells for each impact. The whole synthetic aurora is induced by three major impacts of asteroids. The east-west line features features of crust magnetizations are due to the east-west trending locations of three impacts. The alternatively changed sign of crust magnetization originates from the alternatively changed Bow direction on the tops of adjacent convectional cells.