2020 Fiscal Year Research-status Report
An Open Source Code to Simulate the First Galaxies
| Project/Area Number |
19K23437
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| Research Institution | The University of Tokyo |
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Principal Investigator |
HARTWIG Tilman 東京大学, 大学院理学系研究科(理学部), 助教 (00843434)
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| Project Period (FY) |
2019-08-30 – 2022-03-31
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| Keywords | Public Software / Star Formation / First Stars / Milky Way / Semi-analytical model |
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| Outline of Annual Research Achievements |
1. The core working group of this project has weekly videoconferences to discuss and monitor the project's progress.
2. We are calibrating the model based on six independent observational constraints.
3. We have implemented an MCMC to explore how sensitive the model is to input parameters.
4. We have presented the preliminary results of A-SLOTH at various international conferences (online).
5. Two students (Tokyo/Chennai) were working on simulations of inhomogeneous metal mixing. Their results will eventually be implemented into A-SLOTH.
6. One student in Heidelberg is working on a new method to use unsupervised clustering to compare our simulated MW satellites with observations.
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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
The global Covid-19 pandemic impacted our project. International travel is restricted, and students could not come to Tokyo as planned. We are trying to continue the discussions online as much as possible, but this way of communication is not ideal, and the progress of the project is therefore unfortunately slower than expected.
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| Strategy for Future Research Activity |
- We plan to finish the model calibration in the next three months.
- One student in Chennai continues to work on the simulations of inhomogeneous metal mixing.
- One student in Heidelberg continues to work on the unsupervised clustering of MW satellites.
- A colleague at Stanford and his student are working on an AI-based identification of the first galaxies for which we will use data provided by A-SLOTH.
- We will publish the final code in about six months.
- Finally, we are planning online workshops for our community to get familiar with the software (instead of initially planned in-person meetings).
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| Causes of Carryover |
Due to the global Covid-19 pandemic, several items could not be conducted as originally planned. Especially international travel was restricted and the money from this grant could not be spent on travel, international collaborations, and conferences. The remaining money will be spent on (approximately):
1) Computer hardware to speed-up calibration of our model: 300,000JPY 2) One research student who will continue to study inhomogeneous metal mixing: 200,000JPY 3) Publication fees: 100,000JPY 4) Organisation of an online workshop: 100,000JPY 5) Books & Miscellaneous: 120,000JPY
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