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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク X-factor (astrophysics) ： ウィキペディア英語版 X-factor (astrophysics) The X-factor in astrophysics, often labeled XCO, is an empirically determined proportionality constant which converts carbon monoxide (CO) emission line brightness to molecular hydrogen (H2) mass. ==Origin== The term X-factor was coined in a 1983 paper titled "Gamma-rays from atomic and molecular gas in the first galactic quadrant" and published in The Astrophysical Journal.〔http://www.cfa.harvard.edu/mmw/〕〔http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1983ApJ...274..231L&db_key=AST&data_type=HTML&format=&high=431f39832406116〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「X-factor (astrophysics)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.