銀河の進化 銀河の進化 銀河の進化 孤立したコンパクトの円銀河:逃げ出した恒星系
Igor Chilingarian1, Ivan Zolotukhin2
1Smithsonian Astrophysical Observatory, 60 Garden Street MS09, Cambridge, MA 02138, USA. Sternberg Astronomical Institute, Moscow State University, 13 Universitetsky prospect, Moscow 119992, Russia. igor.chilingarian@cfa.harvard.edu.
Science (New York, N.Y.)
|April 25, 2015
まとめ
コンパクトな円銀河,珍しい恒星系は,今やあらゆる環境で見つかりました. これらの潮的に剥がれた銀河は,おそらく宿主群や群から脱出した.
科学分野:
- 天文学と天体物理学について
- 銀河の形成と進化について
背景:
- コンパクトな円銀河は稀で,密度の高い恒星系である.
- 以前は,それらの形成は,巨大な祖先による潮剥離に起因すると考えられていた.
- 孤立したコンパクトの円銀河の発見は,この考えに異議を唱えた.
研究 の 目的:
- コンパクトな円銀河の形成と普及を調査する.
- 孤立したコンパクト円銀河も潮剥離系であるかどうかを判断する.
主な方法:
- コンパクトな円銀河を特定するために天文調査データを採掘する.
- 動的および恒星群の性質を分析する.
- 発見を銀河の相互作用の数値シミュレーションと比較する.
主要な成果:
- 195のコンパクトな円銀河が,様々な環境で発見されました.
- これらの銀河は,一貫した動的および恒星集団の特徴を示しています.
- ダイナミック分析は,3つの天体との出会いによって,孤立していない銀河がクラスターから放出されることを支持しています.
結論:
- コンパクトな円銀河は,密度の高い環境でのみ形成されるわけではありません.
- 孤立したコンパクトの円銀河と非孤立したコンパクトの円銀河は,おそらく潮的に剥がれたシステムである.
- これらの銀河は,元の宿主群または群から放出されています.
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