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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
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明るい二重中性子星の合併における非対称な質量比
R D Ferdman1, P C C Freire2, B B P Perera3
1Faculty of Science, University of East Anglia, Norwich, UK. r.ferdman@uea.ac.uk.
Nature
|July 10, 2020
まとめ
研究者達が発見した ダブルニュートロン星系は これまでに最も不対称で 結合しています PSR J1913+1102です この発見は,GW170817のような重力波の異常なキロノヴァの放出を 説明する可能性があることを示唆している.
科学分野:
- 天体物理学と天文学
- 重力波天文学
- 中性子星物理学
背景:
- GW170817の二重中性子星の融合は 重力波の観測で確認された唯一の電磁対比現象です
- GW170817の遅い時の電磁気放出は 標準的な中性子星融合モデルと一致しません
- 私たちの銀河系にある 既知の二重中性子星系は ほぼ同じ質量の二重星系です
研究 の 目的:
- パルサーPSR J1913+1102とその同伴中性子星の性質を調査する.
- この二重中性子星の 質量比を判別する
- GW170817を理解するための非対称バイナリ集団の影響を評価する.
主な方法:
- PSR J1913+1102とその同伴者の質量を正確に測定するために専用のパルサータイミングキャンペーンを実施しました.
- 軌道のパラメータを分析し, 離心率と分離を推測する.
- 発見された非対称バイナリシステムに基づいて集団合成分析を行った.
主要な成果:
- パルサーと同伴中性子星の質量は,それぞれ1.62 ± 0.03と1.27 ± 0.03の太陽質量として測定されました.
- 質量比 (q) が0.78±0.03で,これまでに発見された最も非対称な融合システムとして特定されました.
- 集団合成は,非対称バイナリがすべての合併バイナリ集団の 2-30% を構成することを示しています.
結論:
- 非常に非対称なPSR J1913+1102システムの発見は,GW170817の潜在的な祖先を提供します.
- GW170817から観測された異常なキロノヴァ放射は,不対称な中性子星融合によって説明できる.
- この発見により 二重中性子星集団の多様性に関する理解が広がります
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