GRB 130427A:近くの普通のモンスター

A Maselli¹, A Melandri, L Nava

¹Istituto Nazionale di Astrofisica (INAF)-Istituto di Astrofisica Spaziale e Fisica Cosmica (IASF) Palermo, Via Ugo La Malfa 153 I-90146 Palermo, Italy.

Science (New York, N.Y.)

|November 23, 2013

まとめ

長期ガンマ線爆発 (GRB) は,恒星崩壊の稀な出来事です. GRB130427Aは,近くの明るい例であり,宇宙全体でこれらの宇宙爆発を推進するエンジンの洞察を提供します.

科学分野:

天体物理学天体物理学
宇宙の爆発,宇宙の爆発.
恒星の進化について

背景:

長期ガンマ線爆発 (GRB) は,巨大な恒星が崩壊する際に発生する,稀で強力な爆発です.
それらは通常,遠い宇宙で観測され,詳細な研究が困難になります.
GRB 130427Aは,非常に明るく,比較的近くにあるイベント (z = 0.34) です.

研究の目的:

GRB 130427A.の包括的な複数の波長の分析を提供するために.
誘発から後発光段階までの放出の進化を理解するために.
宇宙時間におけるGRBの原因となる中央エンジンを調査する.

主な方法:

スウィフト天文台からのデータを活用した.
リバプール望遠鏡とフォークス望遠鏡からの観測を組み込みました.
他の様々な地上施設からの統合データ.

主要な成果:

GRB 130427Aは,ガンマ線帯域で観測された最も高い流動性を示した.
詳細な多波長観測は,プロンプト・フェーズとアフター・グロー・フェーズをカバーした.
爆発の性質は,非常に明るく,高い赤移りGRBの性質と一致しています.

結論:

GRB 130427Aは,GRBの物理を研究するためのユニークな近くの研究室を提供します.
共通の中央エンジンは,おそらく,宇宙時代とエネルギー範囲を越えてGRBを動かす.
この発見は,長期間続くGRBの起源に関する統一モデルを示唆しています.

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