- 開講元
- 地球惑星科学コース
- 担当教員名
- -
- 授業形態
- 講義
- メディア利用科目
- 曜日・時限(講義室)
- 集中講義等 (石川台, 2号館, 実験棟1-103)
- クラス
- -
- 科目コード
- EPS.A458
- 単位数
- 1
- 開講年度
- 2017年度
- 開講クォーター
- 3-4Q
- シラバス更新日
- 2017年9月20日
- 講義資料更新日
- -
- 使用言語
- 英語
- アクセスランキング
-
media
講義の概要とねらい
The course revolves around recent developments in planet formation, in particularly concerning the topic of pebble accretion. Students will investigate a research problem by analyzing a scientific article and/or simulating a problem computationally.
到達目標
At the end of the course, the student is able to:
- describe what "pebbles" and "pebble accretion" are from an astrophysical perspective; why they matter to planet formation; and to
argue under which conditions pebble accretion becomes important
- conduct an order-of-magnitude analysis, meaning: to analyze a problem and identify the key physical processes; to write down the
corresponding mathematical expressions; and to provide a physical interpretation of the obtained result.
- design a research project and investigate it by analyzing a scientific article or conducting a numerical experiment.
- present the results of the research project and reflect on it.
キーワード
pebbles, planetesimals, planets, planet formation, circumstellar disk
学生が身につける力(ディグリー・ポリシー)
| ✔ 専門力 | ✔ 教養力 | ✔ コミュニケーション力 | ✔ 展開力(探究力又は設定力) | ✔ 展開力(実践力又は解決力) |
授業の進め方
Power point slides and blackboard derivations will be used.
授業計画・課題
| 授業計画 | 課題 | |
|---|---|---|
| 第1回 | Introduction | We discuss the outline of the course and preliminary concepts, such as disk models and particle aerodynamics. We also introduce the scientific articles and computational projects associated with the course. |
| 第2回 | What are pebbles | We contrast the geophysical vs astrophysical definition of "pebble". We also discuss how pebble properties can be deduced from observations at radio wavelengths. |
| 第3回 | Planet formation scenarios and concepts | We discuss the classical scenario for the formation of solar system planets. We focus mostly on the assembly of planets, starting from planetesimals. We discuss successes and drawbacks of this model and assess how it fares against observations of exoplanetary system. |
| 第4回 | Pebble accretion -- the physics | We discuss what pebble accretion is and how it differs from the standard ballistic model. We derive order of magnitude expressions for pebble accretion rates and efficiencies. We discuss the effects of turbulence; we derive the conditions under which pebble accretion is important and when it is not. |
| 第5回 | Pebble accretion -- applications | We apply our knowledge towards the formation and architecture of planetary systems. |
| 第6回 | Pre-planetary atmosphere | We focus on the role of the gas. We discuss the formation of a pre-planetary atmosphere and how this would affect the pebble accretion process. In addition, we discuss the hydrodyanmic interaction between the pre-planetary atmosphere and the gas disk. |
| 第7回 | In-class presentation | This lecture is reserved for the presentation of the projects |
教科書
None
参考書、講義資料等
To be announced in the first class
成績評価の基準及び方法
To be announced in the first class
関連する科目
- EPS.A410 ： 宇宙惑星物理学A
- EPS.A411 ： 宇宙惑星物理学B
- EPS.A412 ： 宇宙惑星物理学C
- EPS.A413 ： 宇宙惑星物理学D
- EPS.A457 ： 地球惑星科学特別講義CII
履修の条件(知識・技能・履修済科目等)
None
