2016 Fiscal Year Research-status Report
Can planetesimal accretion break planet resonance?
| Project/Area Number |
16K17654
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| Research Institution | Japan Aerospace EXploration Agency |
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Principal Investigator |
タスカー エリザベス 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授 (40620373)
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Keywords | astrophysics / exoplanets |
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| Outline of Annual Research Achievements |
This February, we published a comment piece in "Nature Astronomy" (doi: 10.1038/s41550-017-0042) discussing the problem with using metrics to rank exoplanets. Such metrics have a use in target selection schemes, but are not able to access habitability. This work was presented at a conference in Arizona (AbSciCon) in April and at a local workshop on planetaey diversity at ELSI in Tokyo. Two collaborations have begun to extend the initial planetesimal impact project. The first --in collaboration with researchers at ELSI-- is to explore the use of a neuronetwork to investigate statistical distributions in the exoplanet population. The second --in collaboration with McMaster University in Canada-- is to model solid impact collisions on the surface of the moon and small bodies.
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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 paper on planetesimal accretion is drafted and we are running a few more calculations to see if different assumptions regarding the atmosphere expansion (isothermal or adiabatic) change the conclusions.
Several extensions to this project are currently being explored and we hope two papers on exoplanets will be submitted within this academic year.
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| Strategy for Future Research Activity |
Two papers are planned for this year. The paper on planetesimal accretion should be ready within a few months. The second paper on exoplanet statistics using a neuronetwork is underway and we are aiming for a submission in the autumn. A second extension to look at solid impacts on the lunar surface has just begun and requires substantial code development. It is hoped this will be undertaken at the start of next year.
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| Causes of Carryover |
An international conference was planned for right at the start of the financial year in April. Funds were rolled over to allow attendance at this meeting, as well as a second meeting later in the year.
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| Expenditure Plan for Carryover Budget |
For the above mentioned conference (AbSciCon2017) in Arizona in April.
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[Journal Article] The language of exoplanet ranking metrics needs to change2017
Author(s)
Tasker, Elizabeth; Tan, Joshua; Heng, Kevin; Kane, Stephen; Spiegel, David; Brasser, Ramon; Casey, Andrew; Desch, Steven; Dorn, Caroline; Hernlund, John; Houser, Christine; Laneuville, Matthieu; Lasbleis, Marine; Libert, Anne-Sophie; Noack, Lena; Unterborn, Cayman; Wicks, June
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Journal Title
Nature Astronomy
Volume: 1
Pages: n/a
DOI
Int'l Joint Research
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