宇宙学的な距離の巨大な銀河に 局所化された単一の高速ラジオバースト
K W Bannister1, A T Deller2, C Phillips3
1Commonwealth Science and Industrial Research Organisation, Australia Telescope National Facility, P.O. Box 76, Epping, NSW 1710, Australia. keith.bannister@csiro.au rshannon@swin.edu.au.
まとめ
銀河の中心から4キロパルセックで 繰り返し発生しないFRBを 特定しました このFRBは 銀河間媒介と宇宙のネットワークに 新たな洞察をもたらします
科学分野:
- 天文学と天体物理学
- 宇宙学
背景:
- FRBは銀河系外からの 謎めいた強い放射です
- いくつかのFRBは繰り返しますが 大部分は単一のイベントとして観察され,その正確な起源を決定することは困難です.
- 前回の非反復FRBの観測では 宿主銀河を特定するのに 必要な精度が欠けていました
研究 の 目的:
- シングルパルス・ファスト・ラジオ・バースト (FRB) の正確なインターフェロメトリック・ローカライゼーションを達成するために.
- FRBとその宿主銀河の性質を調査するために
- 銀河間媒体の探査機としてFRBの可能性を評価する
主な方法:
- シングルパルスFRB180924の 高精度ローカライゼーションに インターフェロメトリーを使用した.
- 赤道偏移0.3214で輝く宿主銀河に対する 爆発の位置を決定しました
- 視線に沿った電子柱の密度を分析した.
主要な成果:
- FRB 180924が宿主銀河の中心から 4キロパルセック位に位置しています
- FRB 180924が確認されました
- このFRBと宿主 FRBの特徴は 以前と比べて異なっています
- 電子柱の密度が 銀河間媒体のモデルと一致している
結論:
- シングルパルスFRBは高い精度で局所化し,ホスト銀河の識別を可能にします.
- FRB 180924とその環境は,他の局所的なFRBと大きく異なるため,FRBの多様性を強調しています.
- FRBは宇宙のウェブ内のバリオンの 効果的な探査機として機能します
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