ダブルパルサーシステムの幾何学 J0737-3039 系統的な強度の変動から
Fredrick A Jenet1, Scott M Ransom
1Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA. merlyn@alum.mit.edu
Nature
|May 1, 2004
まとめ
この研究は,バイナリパルサー系 (PSR J0737-3039AとB) をモデル化し,同伴パルサーBの電波流の変化を説明しています. このモデルは,パルサーAのパルスプロファイルの進化と,地質学的なプレセシオンによる将来の消失を予測しています.
科学分野:
- 天文学 天文学
- 天体物理学 天体物理学
- パルサー天文学 パルサー天文学
背景:
- 超相対論的な軌道にあるユニークなバイナリパルサー系PSR J0737-3039AとBの発見.
- パルサーBは軌道に依存する放射流動の変動を顕著に表しており,これは以前説明されなかった現象である.
研究 の 目的:
- パルサーBの観測された強度の変動を説明する幾何学的モデルを開発する.
- パルサーAのスピン軸の向きと放射幾何学を制限するために.
主な方法:
- 二重パルサーシステムの幾何学モデルの開発.
- パルサーBの流量変動は,パルサーAの放射からの照明によって引き起こされるという仮定.
主要な成果:
- このモデルは,パルサーBの強度変動をうまく説明しています.
- このモデルは,パルサーAのスピン軸の向きと放射幾何学に関する制約を提供します.
- パルサーAの重要なパルスプロファイルの進化を数年にわたって予測する.
結論:
- この幾何学モデルは,PSR J0737-3039システムで観測された現象について包括的な説明を提供します.
- パルサーAの放射は,そのパルスプロフィールが進化し,地質的プレセシオンにより消滅するので,15〜20年以内に停止すると予測されています.
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