Geomagnetism & Aeronomy
| Numbering Code | U-SCI00 33411 LJ58 | Year/Term | 2022 ・ Second semester | |
|---|---|---|---|---|
| Number of Credits | 2 | Course Type | Lecture | |
| Target Year | 3rd year students or above | Target Student | ||
| Language | Japanese | Day/Period | Mon.2 | |
| Instructor name | TOU HIROAKI (Graduate School of Science Associate Professor) | |||
| Outline and Purpose of the Course | This course aims to reformulate students' understanding of celestial bodies in the solar system, including the Earth, using electromagnetism. Roughly speaking, the solar system consists of astronomical objects such as the star, planets, satellites, plasma (solar wind), and potential fields typically represented by magnetic and gravitational fields. From an electromagnetic point of view, what fills the interplanetary space is mainly plasma and the electromagnetic field. This course, therefore, targets at understanding the electromagnetic properties of the celestial bodies in the solar system from observations and theories on electromagnetism. | |||
| Course Goals |
1. To understand how a magnetic field is generated and maintained as an intrinsic magnetic field within a magnetized planet. 2. To understand the basics of the interaction between the intrinsic magnetic field and the solar wind. 3. To understand that the electrical structure inside an astronomical body, including the Earth, can be determined using electromagnetic field observations collected on the body's surface (including at the seafloor), or spacecrafts' altitudes. |
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| Schedule and Contents |
I will give one lecture on each of the following (* indicates the corresponding chapter in Solar Terrestrial Sciences, mentioned in the Reference texts section): 1. Basics of vector analysis 2. Basics of electromagnetism 3. Spatial distribution of the geomagnetic field (*Chapter 10) 4. Secular variation of the geomagnetic field (*Chapter 10) 5. Geomagnetic reversals (*Chapter 10) 6. Geomagnetism and seafloor spreading (*Chapter 10) 7. Geomagnetic dynamos (*Chapter 12) 8. Planetary dynamo actions (*Chapter 12) 9. Ocean dynamo actions 10. Planetary magnetosphere (*Chapter 6) 11. Relationship between solar activity and geomagnetism (*Chapter 5) 12. Atmospheric electricity 13. Electromagnetic induction ins the celestrial bodies (*Chapter 11) 14. Induced electromagnetic fields and electrical structures in the celestial bodies (*Chapter 11) 15. Feedback The order and contents of the lecture are subject to change depending on the students' basic ability and understanding. I will provide instructions to help students prepare for and review course material either before the course or during the lectures. |
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| Course Requirements | It is desirable, but not required, to have taken related courses (e.g., Electromagnetics A/B, etc.). | |||
| Study outside of Class (preparation and review) | Main points of out-of-class learning are written in yellow on the distributed handouts. When reviewing each session, pay special attention to these points. | |||
| Textbooks | Textbooks/References | Lecture materials I prepared will be distributed at the beginning of each session. | ||
| References, etc. |
* SGEPSS School Education WG, 太陽地球系科学 [Solar Terrestrial Sciences], Kyoto University Press, 2010. ISBN: 978-4-87698-971-3. * Richard P. Feynman, Robert B. Leighton, and Matthew Sands, 電磁気学,宮島龍興訳 [“Chapter 1: Electromagnetism,” The Feynman Lectures on Physics, Vol. II: Mainly Electromagnetism and Matter], Iwanami Shoten. ISBN: 4-00-007713-9. I also recommend Feynman Lectures on Physics Properties of Electromagnetic Waves, Vol. IV (Japanese version). * Frank D. Stacey and Paul M. Davis, Physics of the Earth (4th ed.), Cambridge University Press, 2008. ISBN: 978-0-521-873628. |
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