裸眼で見られるガンマ線爆発GRB 080319Bのブロードバンド観測
J L Racusin1, S V Karpov, M Sokolowski
1Department of Astronomy and Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802, USA. racusin@astro.psu.edu
Nature
|September 12, 2008
まとめ
この研究では,長時間のガンマ線爆発 (GRB) の明るい即時光学およびガンマ線放射を観察しました. 発見は,排出が単一の地域から発生することを示唆し,二組のジェットの中で非常に相対的な出流を示しています.
科学分野:
- 天体物理学 天体物理学
- 高エネルギー天体物理学
- 宇宙の爆発,宇宙の爆発.
背景:
- 長期ガンマ線爆発 (GRB) は,強力な宇宙爆発です.
- GRBは,巨大な恒星が崩壊し,ブラックホールが形成される過程について,洞察を与えてくれます.
- 以前の観測では,GRBの放出源を研究するのに十分な詳細が欠けていました.
研究 の 目的:
- GRB 080319B.の即時光学およびガンマ線放射を分析するために.
- 瞬発発射から後発光への移行を理解するために.
- GRBを駆動する物理的プロセスを調査する.
主な方法:
- GRB 080319Bのプロンプトとアフターグロー放射のブロードバンド観測.
- 高時間解像度の光学およびガンマ線データ収集.
- 爆発発生から数秒以内に放出特性の分析.
主要な成果:
- GRB 080319B.からの例外的に明るい即時光学およびガンマ線放射が観測されました.
- プロンプト・エミッションが単一の物理領域から発生することを実証した.
- 狭い2つの構成要素のジェットコアの中で極めて相対的な流出を暗示した.
結論:
- GRBにおける即時放出メカニズムは制約されています.
- GRBのアウトフローは,高度に相対的であり,コリマートされています.
- この研究は,GRBの物理学とブラックホールの形成に関する私たちの理解を高めます.
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