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Updated: May 6, 2026

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Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
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z = 7.085の赤道移転で輝くクエサール
Daniel J Mortlock1, Stephen J Warren, Bram P Venemans
1Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK. mortlock@ic.ac.uk)
Nature
|July 2, 2011
まとめ
天文学者は赤道偏移7.085でクエーサー (ULAS J1120+0641) を発見し,初期の宇宙に関する新しい洞察を提供した. この発見は,銀河間媒体を探査するのに役立ちます.
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
- 初期の宇宙の研究 初期の宇宙の研究
背景:
- 銀河間介質 (IGM) はビッグバンから約10億年後に完全に再イオン化されました.
- 赤偏移 (z) >6.5のクエーサーを観測することは,光学調査の限界のために困難です.
- 以前の研究は,再イオン化を理解するためにz <6.5のクエーサーに頼っていた.
研究 の 目的:
- 高赤偏移 (z>6.5) のクエーサーを特定し,特徴づけ,IGMを調査する.
- 初期の宇宙と再イオン化の時代の性質を調査する.
- 宇宙の黎明時のIGMの中性分子を理解するために,宇宙の黎明時のIGMの中性分子を理解するために,宇宙の黎明時のIGMの中性分子を理解するために.
主な方法:
- 光学調査を利用して,高赤偏移クワザール候補を特定しました.
- ULAS J112001.48+064124.3 (z=7.085) のスペクトル観測を行った.
- クワザーの光度,ブラックホールの質量,および近隣ゾーンの電離半径を分析した.
主要な成果:
- 発見したULAS J1120+0641は赤道偏移z=7.085で,ビッグバンから077億年後のこと.
- 測定された明るさは6.3 × 10^13 L () で,ブラックホールの質量は2 × 10^9 M () でした.
- 観測された近帯半径は1.9メガパーセックで,z ~ 6.0-6.4クエーサーの典型的な半径より小さい.
- 近接圏の伝送プロファイルは,Lyα阻害翼を示し,前景のIGMで中性分数>0.1を示唆しています.
結論:
- ULAS J1120+0641は,z ~ 7.のIGMの重要なプローブを提供します.
- より小さなイオン化された近くゾーンとLyαダッピングウィングは,初期のIGMで重要な中性水素を示唆しています.
- この発見は,再イオン化の時代を研究するための観測の限界を押し広げている.
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