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Published on: February 12, 2013
重力レンズ付きクエーサーは,14.62弧秒で隔てられた4つの画像を持つ
Naohisa Inada1, Masamune Oguri, Bartosz Pindor
1Department of Physics, School of Science, The University of Tokyo, 113-0033, Japan. inada@utap.phys.s.u-tokyo.ac.jp
Nature
|December 20, 2003
まとめ
天文学者は,重力レンズ化されたクエーサー,SDSS J1004+4112を発見し,記録的な14.62弧秒の距離を記録した. この発見は,冷たい暗黒物質モデルを支持し,レンズ化した物体が暗黒物質に支配されていることを示しています.
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
- ダークマターの研究 ダークマターの研究
背景:
- 重力レンズは,暗黒物質の分布をマッピングするために重要です.
- 寒い暗黒物質モデルは,大きな分離レンズを持つクエーザーを予測しているが,発見されたのはわずかである.
- 現存するレンズ状クエザーは小さな分離があり,それはバリオン物質に起因する.
研究 の 目的:
- 大分離重力レンズクワザーの発見を検索し,報告する.
- 寒い暗黒物質モデルを支持する観測的証拠を提供すること.
- シンプルなレンズシステムにより,宇宙学的探査機としてクエザーを利用する.
主な方法:
- 重力レンズ効果を示すクエーザーを探した.
- レンズ付きクワザーの構成要素の画像分離を分析した.
- 寒い暗黒物質モデルの枠組みの中で解釈された結果.
主要な成果:
- 重力レンズ付きクエーサール,SDSS J1004+4112.を発見しました.
- 計測された最大構成要素分離は 14.62 弧秒でした.
- 大きな分離は,レンズの質量が暗黒物質によって支配されていることを強く示唆しています.
結論:
- SDSS J1004+4112の発見は,冷暗物質モデルの予測と一致しています.
- この発見は,大規模な構造形成に関するモデルの予測を検証しています.
- 大分離レンズクエーザーは,暗黒物質の研究の貴重なツールです.
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