A Possible Cause of Magnetic Anomalies on the Southern Martian Hemisphere

• 来源期刊: 中国物理快报（英文版）
• 关键词: @@
• 年，卷（期）: 2016,（8）
• 页码范围: 155-157
• 页数: 3页
• 语种: 中文
• DOI: 10.1088/0256-307X/33/8/089601

摘要

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 flow direction on the tops of adjacent convectional cells.