翻訳と辞書 Words near each other ・ Helium atom scattering ・ Helium Comedy Club ・ Helium cryogenics ・ Helium dating ・ Helium dilution technique ・ Helium dimer ・ Helium flash ・ Helium focusing cone ・ Helium hydride ion ・ Helium ionization detector ・ Helium line ratio ・ Helium mass spectrometer ・ Helium planet ・ Helium production in the United States ・ Helium release valve ・ Helium star ・ Helium trimer ・ Helium Vola ・ Helium Vola (album) ・ Helium-3 ・ Helium-3 refrigerator ・ Helium-3 surface spin echo ・ Helium-4 ・ Helium.com ・ HeliumV ・ Helium–neon laser ・ Heliura ・ Heliura amazonicum ・ Heliura assimilis ・ Heliura baleris Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Helium star ： ウィキペディア英語版 Helium star A helium star or helium strong star is a class O or B star (blue), which has extraordinarily strong helium lines and weaker than normal hydrogen lines, indicating strong stellar winds and a mass loss of the outer envelope. ''Extreme helium stars'' (EHe) entirely lack hydrogen in their spectra.〔(Daviddarling.info: helium star )〕 Previously, a ''helium star'' was a synonym for a B class star, but this usage is considered obsolete. A ''helium star'' is also a term for a hypothetical star that could occur if two helium white dwarfs with a combined mass of at least 0.5 solar masses merge and subsequently start nuclear fusion of helium, with a lifetime of a few hundred million years. It is believed this is the origin of the extreme helium stars. ==See also== * R Coronae Borealis variable 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「Helium star」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.