| 火星感应磁场模型及其磁力线分布 |
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| 引用本文： | 童冬生,陈出新.火星感应磁场模型及其磁力线分布[J].地球物理学报,2010,53(9):2155-2160. |
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| 作者姓名： | 童冬生 陈出新 |
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| 作者单位： | 中国科学院基础等离子体重点实验室 中国科学技术大学地球和空间科学学院,合肥 230026 |
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| 基金项目： | 中国科学院重要方向项目，国家自然科学基金项目 |
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| 摘 要： | 本文利用火星具有电离层而无内禀磁场的特点以及它与太阳风相互作用的性质,通过适当的假设,建立了火星感应磁场模型.此模型建立如下,利用电流连续的特性: Δ·j=0 (j为感应电流)以及对火星磁层中的电流体系分布的合理假设给出电流,并由毕奥-萨伐尔定理得到火星周围的磁场强度的表达式;利用我们自编的磁力线跟踪程序由求得的磁场强度得到火星周围的磁力线分布.我们发现:利用此火星磁场模型得到的火星周围的磁力线分布与卫星观测的结果以及其他方法得到的结果符合的很好.
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| 关 键 词： | 火星 内禀磁场 感应磁场 电离层 磁层顶 电流片 |
| 收稿时间： | 2009-11-24 |
A model of Martian induced magnetic field and the distribution of magnetic field lines |
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| TONG Dong-Sheng,CHEN Chu-Xin.A model of Martian induced magnetic field and the distribution of magnetic field lines[J].Chinese Journal of Geophysics,2010,53(9):2155-2160. |
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| Authors: | TONG Dong-Sheng CHEN Chu-Xin |
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| Institution: | CAS Key Laboratory of Basic Plasma Physics, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026,China |
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| Abstract: | Based on the facts that there is an ionosphere above the solid Mars but there is no intrinsic magnetic field inside its solid body, and also the characteristic of the interaction between the solar wind and Marian ionosphere, a model of Martian induced magnetic field is proposed. The model is as follows, according to the conservation of current: Δ·j=0 (where j is the induced current) and appropriate assumptions on the distribution of the current of Martian Magnetosphere, the expressions of Martian magnetic field can be obtained through Biot-Savart theorem and the distribution of Martian magnetic field lines can be obtained through the use of our program of tracing magnetic field lines.We find that the results obtained via the model of magnetic field are consistent with observational results from satellite and the results gained by using other methods. |
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| Keywords: | Mars Intrinsic magnetic field Induced magnetic field Ionosphere Magnetopause Current sheets |
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