2023 Fiscal Year Research-status Report
Rogue planets: Explaining the origins of an undiscovered planet and the orbital structure in the outer solar system
| Project/Area Number |
23K03482
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| Research Institution | Kindai University |
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Principal Investigator |
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| Project Period (FY) |
2023-04-01 – 2026-03-31
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| Keywords | 太陽系 / 巨大惑星 / カイパーベルト / 未知の惑星 / solar system / giant planets / Kuiper Belt / undiscovered planets |
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| Outline of Annual Research Achievements |
This research has two main goals: (1) What was the influence of rogue planets in originating the orbital structure of the outer solar system? (2) What are the odds that one of these rogue planets survived as a resident planet in the solar system today?
The main achievements of last FY2023 are the following:
- A detailed analysis of several past studies related to this research’s goals was done. This information is crucial for developing the early solar system’s main model and writing papers during 2024 and beyond.
- A model representing the early solar system containing 5-6 giant planets (Jupiter, Saturn, Uranus, Neptune included) and 1-7 rogue planets was completed.
- I prepared the initial conditions and codes necessary to execute the main simulations of the model.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The main simulations of the model have been running since the beginning of 2024. They are expected to finish in a few months from now.
I am also collecting more details about recent studies with results related to this research to keep the analysis up-to-date.
As planned, all procedures and achievements of the project are progressing within the expected and without problems.
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| Strategy for Future Research Activity |
After analyzing the simulation data of some of the main simulations, I intend to summarize the first preliminary results of this project during the second semester of 2024. The plan is to present these results in national (and international, if possible) meetings and one short peer-reviewed paper during FY2024. The preparation and writing of this paper will take a few months during the late 2024 and early 2025 period.
All main simulations are expected to be finished by the end of 2024. More detailed analyses are expected to occur in 2025.
The complete achievements of goals (1) and (2) will be obtained in FY2025, as planned.
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| Causes of Carryover |
Following the original plan for FY2023, I visited a collaborator (Takashi Ito) at the National Astronomical Observatory of Japan in February 2024 to enrich the quality of the research. Considering the collaborator’s agenda and the visit’s goals, which defined the visit length, the total costs were limited to about 93,000 yen, which was quite close to the expected costs (100,000 yen). The remaining amount is relatively small, so it should not affect the expenditure plan for FY2024. In particular, I plan to use the budget to present the project’s preliminary results in international and national meetings and to support preparing a paper about these results.
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