2023 Fiscal Year Research-status Report
Understanding the origin of heavy elements with end-to-end simulations of neutron star mergers
| Project/Area Number |
23K19059
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| Research Institution | Tohoku University |
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Principal Investigator |
HAMIDANI HAMID 東北大学, 理学研究科, 特任助教 (50979119)
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| Project Period (FY) |
2023-08-31 – 2025-03-31
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| Keywords | Gamma-ray bursts / Neutron stars / Neutron star mergers / Relativistic jets |
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| Outline of Annual Research Achievements |
The objective of this project is to investigate neutron star mergers, which are anticipated to generate short gamma-ray bursts and instigate the nucleosynthesis of heavy elements. The subsequent radioactive decay of these elements is projected to give rise to a distinctive astrophysical event known as a "kilonova."
Collaborating with theoretical specialists, we investigated the impact of relativistic jets on kilonova emissions. We have demonstrated, for the first time, that late-stage relativistic jets (commonly observed in most short gamma-ray bursts) interact with the ejecta from neutron star mergers to produce an early blue emission. Our findings suggest that this interaction can elucidate the enigmatic early "blue early kilonova" emissions observed.
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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 project is progressing smoothly and is on track to achieve its goals.
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| Strategy for Future Research Activity |
I plan to proceed as intended. The next step involves conducting calculations for the kilonova emission in a highly realistic manner using state-of-the-art hydrodynamic and radiative transfer simulations.
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| Causes of Carryover |
Next year, I plan to attend multiple international conferences. Additionally, I intend to travel to Europe and stay there for several weeks to discuss my project with collaborators in person. Furthermore, I plan to acquire new equipment (computer in particular) and cover the publication fees.
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