| 研究課題/領域番号 |
20K04049
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| 研究種目 |
基盤研究(C)
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| 配分区分 | 基金 |
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| 応募区分 | 一般 |
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| 審査区分 |
小区分17010:宇宙惑星科学関連
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| 研究機関 | 近畿大学 |
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研究代表者 |
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| 研究期間 (年度) |
2020-04-01 – 2024-03-31
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| 研究課題ステータス |
交付 (2022年度)
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| 配分額 *注記 |
2,080千円 (直接経費: 1,600千円、間接経費: 480千円)
2022年度: 1,300千円 (直接経費: 1,000千円、間接経費: 300千円)
2021年度: 650千円 (直接経費: 500千円、間接経費: 150千円)
2020年度: 130千円 (直接経費: 100千円、間接経費: 30千円)
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| キーワード | 太陽系 / 太陽系外縁天体 / カイパーベルト / 未知の惑星 / solar system / trans-Neptunian objects / Kuiper Belt / undiscovered planets / Neptune / Kuiper belt |
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| 研究開始時の研究の概要 |
Is there an unknown planet in the solar system today? Did additional planets exist during the early solar system? Based on computer simulations, this research will investigate the existence and role of such Kuiper Belt Planet (KBPs) in solar system history. Our results will guide future astronomical surveys that may discover a new planet in the solar system today.
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| 研究実績の概要 |
This research has two main goals: (1) How does a Kuiper Belt Planet (KBP) located beyond Neptune perturb the orbits of trans-Neptunian objects (TNOs)? (2) The Kuiper Belt orbital structure by considering the existence of KBPs in the early solar system. The main achievements so far are:
- The model of the intrinsic Kuiper Belt was completed in FY2022. This model considered the real resonant + distant populations and investigated the effects of potential KBPs. This model simulations finished during 2022. Overall, I found that KBPs located beyond 100 astronomical units and with masses comparable to or less than Earth’s allowed the survival of these observed populations. Thus, I validated the results by constraining the properties of the investigated KBPs. After thoroughly analyzing the data of the intrinsic Kuiper Belt model described above, I summarized the main results in a paper by the end of FY2022 and submitted it to a journal with peer review. Currently, this paper is under revision.
- The model of formation of the Kuiper Belt including and not including KBPs was executed successfully in FY2022. This model considered the early solar system and investigated the effects of primordial KBPs. This model simulations finished during 2022. I have recently finished analyzing the data from these simulations. Overall, I found that many systems with KBPs can better explain the Kuiper Belt structure. I intend to summarize the main results in a new paper during 2023.
In conclusion, as planned, the entire achievement of the main goals was obtained by the end of FY2022.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The main results based on the model of the intrinsic Kuiper Belt were summarized in a paper currently under review.
Currently (4/2023), I am doing the final analysis based on the model of the Kuiper Belt. This procedure will give me the details necessary to start writing a second paper about this project.
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| 今後の研究の推進方策 |
I intend to finish revising the first paper about the intrinsic Kuiper Belt model. This paper should be accepted for publication during FY2023. Because the main results were already summarized, I plan to present them in several national and international meetings during FY2023.
After the revision of the first paper mentioned above, I intend to finish fully analyzing the data of the formation of the Kuiper Belt model by mid-2023. Then, I plan to write a second paper by the end of FY2023. Finally, I expect to present the main results of this second paper in 2024.
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