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07:46
Setting Limits on Supersymmetry Using Simplified Models
Published on: November 16, 2013
z ≈ 5.3の赤道移転で銀河の大規模なプロトクラスター
Peter L Capak1, Dominik Riechers, Nick Z Scoville
1Spitzer Science Centre, 314-6 California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA. capak@astro.caltech.edu
Nature
|January 14, 2011
まとめ
天文学者は,ビッグバンから10億年後の銀河の大規模なプロトクラスターを発見しました. この初期の銀河団には,クエーサーと分子ガスを含む非常に大きな銀河が含まれており,宇宙学的モデルと一致しています.
科学分野:
- コスモロジー・コスモロジーとは
- 銀河の形成と進化について
- 天体物理学 天体物理学
背景:
- ビッグバンから39億年後に観測された巨大な銀河団には,それ以前に形成された恒星が含まれています.
- 宇宙学的モデルは,これらの星団は,プロトクラスターと呼ばれる巨大な銀河の初期の過密から階層的に形成されると予測しています.
- これらの初期のプロトクラスターに関する観測的証拠は,その希少性と観察の難しさのために制限されています.
研究 の 目的:
- 極めて初期のプロトクラスター領域の発見を報告する.
- 銀河団の階層的形成を支持する観測的証拠を提供すること.
主な方法:
- 赤い偏移 z = 5.3 (ビッグバンから10億年後の) のプロトクラスター領域の観測.
- 質量,光度,分子ガス含有量を含む銀河の性質の分析.
主要な成果:
- 13メガパーセックを超えるプロトクラスター領域が特定されました.
- プロトクラスターには,輝くクエーサーと,分子ガスに富んだ系が含まれています.
- この地域の暗黒物質と光物質の含有量は,太陽の質量4×10^11を超えています.
結論:
- 発見されたプロトクラスターは,最も初期の銀河団の冷たい暗黒物質の宇宙学的シミュレーションからの予測と一致しています.
- この発見は,初期の宇宙における巨大な銀河の階層的集合に対する重要な観測的支持を提供します.
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