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Velaパルサーの磁気圏の変化
Jim Palfreyman1, John M Dickey2, Aidan Hotan3
1University of Tasmania, Sandy Bay, Tasmania, Australia. jim77742@gmail.com.
Nature
|April 13, 2018
まとめ
突発的なスピンアップイベントであるパルサーの故障は,単一パルスラジオ観測を用いてベラパルサーで観察されました. これらの事象はパルス形と 偏振の変化を明らかにし 中性子星の内部に洞察を与えました
科学分野:
- 天文学と天体物理学
- プラズマ物理学
- 凝縮物質物理学
背景:
- パルサーは磁気二極放射線によって回転エネルギーを失い,スピンダウンを引き起こします.
- パルサーの故障は,超流体渦巻の放出と角運動量交換に関連した突然のスピンアップイベントです.
- 以前の研究では,障害メカニズムを分析するための高時間解像度データがなかった.
研究 の 目的:
- パルサーの故障の背後にある 物理的過程を調査する
- 中性子星の内部の超流体の性質を調査する
- パルサーの磁気圏に 異常が生じた影響を分析する
主な方法:
- ヴェラパルサーの連続した高解像度単一パルス無線観測が3年間行われました.
- 2016年12月12日の障害の検出と分析
- パルスフルーツの密度,偏差,および障害時の到着時間の検査.
主要な成果:
- 脈動の突然の変化が観察されました. 脈動が大きく,脈動がゼロです.
- 予期せぬ低線形偏振を 検出した
- 磁気圏の影響で 2.6秒間隔でパルス到着が遅れた
結論:
- 観測された現象は,超流体渦巻きを伴う障害メカニズムの直接的な証拠を提供します.
- 高時間解像度観測は中性子星の内部と磁気圏の相互作用を理解するために重要です.
- この研究は,中性子星の状態と超流体特性に関する新しい制約を提供します.
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