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太陽の質量範囲40-100の2つの星の孤立した進化からの最初の重力波源
Krzysztof Belczynski1, Daniel E Holz2, Tomasz Bulik1
1Astronomical Observatory, Warsaw University, Ujazdowskie 4, 00-478 Warsaw, Poland.
Nature
|June 24, 2016
まとめ
重力波で検出された 巨大なブラックホールの合併は 低金属二重星から発生します 私たちのシミュレーションは GW150914を 説明し 恒星の進化から 毎年何千もの検出を 予測しています
科学分野:
- 天体物理学
- 重力波天文学
- 星の進化について
背景:
- 観測された最初の重力波イベント GW150914は 2つの巨大なブラックホールが 融合したものです
- 過去のモデルでは 巨大で金属度が低い二重星をシミュレートするのに 精度が不足しており ブラックホールの合併の予測を制限していました
研究 の 目的:
- 孤立した二重星から 二重ブラックホール形成の 高精度の数値シミュレーションを行う.
- GW150914を解釈し,ブラックホールの合併による将来の重力波を予測するための枠組みを提供する.
主な方法:
- 物理的に現実的な 孤立した巨大な二重星の進化をシミュレートした
- 低金属性環境における質量移転と共通の封筒相に焦点を当てています.
- ブラックホール形成,スピン,融合率を計算した.
主要な成果:
- 巨大なブラックホールの合併は,太陽質量40〜100の恒星から10%未満の太陽質量を持つ環境で形成される可能性があります.
- ほとんどの二重ブラックホールは 超新星なしで形成され 生まれつきのスピンを保持しています
- 提案された古典的なフィールド形成モデルは,ダイナミックな形成チャネルよりも約40倍の合併を予測しています.
結論:
- この研究は重力波で検出された 巨大なブラックホールの 合併を解釈し予測するための 堅固なモデルを提供します
- 将来の重力波観測所では,年間1,000個のブラックホールの合併を検出でき,その総質量は太陽の質量20~80倍になる.
- 先祖星は ビッグバンから約20億~110億年後に形成されたと考えられます
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