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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 16, 2013
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SSS17aが二重中性子星の合併の結果であることを示す電磁的証拠
C D Kilpatrick1, R J Foley2, D Kasen3,4
1Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA. cdkilpat@ucsc.edu.
まとめ
引力波 (GW170817) で検出された2つの中性子星の融合により,光学的トランジエンント (SSS17a) が生成された. このキロノヴァの発生は 急速な中性子捕獲によって加速され 二重中性子星の 融合の起源が確認されました
科学分野:
- マルチメッセンジャー天文学
- 天体物理学
- 核天体物理学
背景:
- LIGOとVirgoの観測所による重力波 (GW170817) の検出
- 銀河NGC4993のSSS17aという光学トランジエントを同時に発見した.
- コンパクトなオブジェクトの合併の性質を独立に制限するための電磁観測の必要性.
研究 の 目的:
- SSS17aの光学および近赤外線光度測定とスペクトロスコピーを分析する.
- SSS17aの観測を天体物理学的トランジエントの理論モデルと比較する.
- 重力波GW170817の起源を確認する
主な方法:
- SSS17aの光度測定とスペクトル観測
- 観測データをキロノヴァモデルと比較する.
- 急速の中性子捕獲 (rプロセス) による放射性元素生成の分析.
主要な成果:
- SSS17aは,他の知られた天体物理的トランジタとは異なるユニークな特徴を示しています.
- 観測されたSSS17aの性質は,キロノヴァの理論的予測と一致しています.
- トランジエントは r-プロセスで合成された重元素で動いている.
結論:
- SSS17aは 二重中性子星の合併の結果です
- 電磁観測は GW170817の重力波の検出を独立して確認した.
- この研究は 重力波と ニュートロン星の融合による キロノヴァの関連性を 強化しています
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