クエサール:非常に長いベースラインのインターフェロメトリーによって明らかにされたミリ秒のアーチ構造
まとめ
ラジオインターフェロメーターによる観測により,クワザール3C 279と3C 273の微細構造が明らかになりました. データによると,3C 279は,約20光年離れた2つの無線放射点を有しており,相対論的運動の検出を可能にする可能性がある.
科学分野:
- 天文学 天文学
- 天体物理学 天体物理学
- ラジオ天文学 ラジオ天文学
背景:
- クエサールは,電磁スペクトル全体で強力な放射線を放射する活発な銀河核です.
- クワザール放射の微細な構造を理解することは,クワザールの物理的過程と環境を調査するために極めて重要です.
研究 の 目的:
- クワザール3C 279と3C 273の放射放射の微細構造を調査する.
- 観測された無線放射パターンを物理モデルの観点から解釈する.
主な方法:
- 高解像度観測のためにゴールドストーン・ヘイスタック無線干渉計を使用.
- フリンジ振幅データを分析して,無線放射源の空間分布を推論する.
主要な成果:
- 3C 279と3C 273の両方の無線放射における微細構造の検出.
- 3C 279の場合,データは,約1.55 x 10^-3弧秒 (約20光年) で隔てられている2つの等しく寄与する放射点と一致しています.
- 3C 279の分離測定は形式的な不確実性があり,1年以内に相対論的自運動の潜在的検出を可能にします.
結論:
- クワザール放射の観測された微細構造は,それらのコンパクトな源領域の洞察を提供します.
- 3C 279の結果は,相対論的ジェットやバイナリ・アクティブ銀河核の兆候である可能性のある複雑な放射構造を示唆しています.
- 両クワザール,特に3C 273.の解釈を確認するためにさらなる観測が必要である.
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