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Updated: Jun 21, 2026

10:52
Direct Imaging of Laser-driven Ultrafast Molecular Rotation
Published on: February 4, 2017
アーカイブデータから,赤道偏移z約2のIIn型超新星
Jeff Cooke1, Mark Sullivan, Elizabeth J Barton
1Center for Cosmology, Department of Physics and Astronomy, University of California, Irvine, California 92697-4574, USA. cooke@uci.edu
Nature
|July 10, 2009
まとめ
3つのIIn型超新星は,新しい方法を用いて,高い赤偏移で発見されました. この発見は,巨大な恒星形成のモデルを支持し,恒星の初期質量関数の進化に関する理論に異議を唱える.
科学分野:
- 天文学 天文学
- コスモロジー・コスモロジーとは
- 天体物理学 天体物理学
背景:
- タイプIア型超新星は赤偏移z ≈ 1.7まで観測され,タイプII型超新星はz ≈ 0.7.7まで観測される.
- IIn型超新星,大質量恒星の核崩壊爆発は,紫外線で明るく,強い放射線を示し,高い赤道移転 (z ≈ 2) で検出することができます.
研究 の 目的:
- 高赤偏移で3つのスペクトル検査で確認されたIIn型超新星を発見したことを報告するために.
- 超新星IIn型のユニークな特性を利用した方法を使用して,高赤道移転の検出を行う.
- 巨大な恒星形成を高赤偏移で探査する.
主な方法:
- 専門的な検出方法を使用してアーカイブデータの分析.
- 超新星型と赤色偏移のスペクトル検査による確認.
- 超新星IIn型の紫外線と放射線特性を利用する.
主要な成果:
- レッドシフト z = 0.808,2.013と2.357.7の3つのIIn型超新星を発見した.
- 観測されたIIn型超新星の数は,局所的な恒星の初期質量関数と一致しています.
- この発見は,進化する初期質量関数のモデルに異議を唱えている.
結論:
- IIn型超新星は,初期の宇宙における巨大な恒星形成の貴重な探査機である.
- 現在の観測は,標準的な恒星の初期質量関数モデルと一致しています.
- 観測を進化する初期質量関数理論と調和させるため,さらなる研究が必要である.
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