Ia型超新星を拡大する重力レンズの検出
Robert M Quimby1, Masamune Oguri, Anupreeta More
1Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8583, Japan.
Science (New York, N.Y.)
|April 26, 2014
まとめ
天文学者は,IA型超新星 (SNIa) が前景の銀河によって拡大されたことを確認しました.
科学分野:
- コスモロジー・コスモロジーとは
- 天体物理学 天体物理学
- 重力レンズ化は,重力レンズによるものです.
背景:
- 型Ia超新星 (SNIa) は,宇宙距離の測定に極めて重要です.
- 巨大な物体による重力レンズ化は,SNIaの複数の画像を作成し,宇宙膨張のテストを可能にします.
- レンズ化されたSNIaを他の現象から区別するのは難しい.
研究 の 目的:
- 明るい超新星についての議論を解決するために:新しいタイプまたは拡大されたSNIa.
- 前面の銀河によってSNIaの強い拡大の最初の例を確認する.
- よりレンズ化されたSNIaを発見するための方法を探求する.
主な方法:
- 超新星の光が消えた後に超新星のスペクトルを取得しました.
- 前景の銀河の存在を特定するためにスペクトルを分析しました.
- レンズ状超新星に関する予測と観測データを比較した.
主要な成果:
- 超新星が1型超新星 (SNIa) であることが確認され,前景の銀河によって強く拡大された.
- 消去後のスペクトルはレンズ銀河を明らかにし,観測に関する議論を解決した.
- この発見は,以前に推定されたより多くのレンズ化されたSNIaが存在する可能性があることを示唆しています.
結論:
- この研究は,SNIaが前景の銀河によって重力的に強く拡大された最初の確認されたケースを提示しています.
- この発見は,SNIaが強いレンズ系における探査機としての使用を検証している.
- 将来の調査では,レンズ化されたSNIaの発見率が予想よりも高くなる可能性があります.
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