三重星系にあるミリ秒パルサー
S M Ransom1, I H Stairs2, A M Archibald3
1National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, Virginia 22903-2475, USA.
Nature
|January 7, 2014
まとめ
ミリ秒パルサーと2つの白矮星を含む三重系は,強力な重力相互作用を示しています. このシステムは,アインシュタインの一般相対性理論と強い等価原理のテストのためのユニークな研究室を提供します.
科学分野:
- 天文学と天体物理学について
- 重力物理学 重力物理学とは重力物理学です.
- 恒星の進化について
背景:
- 三体系は銀河では一般的であり,天体の性質や重力理論の洞察力を提供します.
- パルサーを含むトリプルシステムは希少で,物理学のテストのために正確な測定を提供します.
- PSR B1620-26のような以前のシステムは弱い相互作用を示し,その有用性を制限しました.
研究 の 目的:
- 階層的な三重システムPSR J0337+1715の精密タイミングと多波長観測を報告する.
- このシステム内の強い重力相互作用を分析するために.
- 一般相対性理論の強い等価性原理を検証する可能性を評価する.
主な方法:
- ミリ秒パルサーの正確なタイミング.
- システムの構成要素の多波長観測.
- 軌道動力学と重力相互作用の分析.
主要な成果:
- パルサーと,その2つの白矮星相伴の質量を決定した.
- 軌道の傾きを測定して,約39.2度としました.
- 予期せぬコプラナーとほぼ円形の軌道を観測し,異様な進化の歴史を示唆した.
結論:
- 外側の白矮星の強い重力場は中性子星を含む内側の二重星を加速させる.
- PSR J0337+1715は,強い同等性原理をテストするための理想的な実験室として機能します.
- システムの軌道構成は,恒星系進化の既存のモデルに異議を唱える.
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