| 研究課題/領域番号 |
23K19059
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| 研究種目 |
研究活動スタート支援
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| 配分区分 | 基金 |
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| 審査区分 |
0204:天文学、地球惑星科学およびその関連分野
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| 研究機関 | 東北大学 |
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研究代表者 |
HAMIDANI HAMID 東北大学, 理学研究科, 特任助教 (50979119)
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| 研究期間 (年度) |
2023-08-31 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
2,860千円 (直接経費: 2,200千円、間接経費: 660千円)
2024年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
2023年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
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| キーワード | Gamma-ray bursts / Neutron stars / Neutron star mergers / Relativistic jets / gravitational waves / nucleosynthesis / radiative transfer / stars: neutron / ISM: jets and outflows |
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| 研究開始時の研究の概要 |
Here, in order to measure heavy elements synthesized in NS merger events, I propose to perform end-to-end multi-dimensional numerical simulations from the actual merger to the kilonova emission. This will help estimate the contribution of NS mergers to synthesis of heavy elements in the Universe.
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| 研究実績の概要 |
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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| 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 project is progressing smoothly and is on track to achieve its goals.
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| 今後の研究の推進方策 |
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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