An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian
فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک
M. Heydari-Malayeri - Paris Observatory
HomepageWO Wolf-Rayet Wolf-Rayet-e WO Fr.: Wolf-Rayet WO A → Wolf-Rayet star whose spectrum shows emission lines of carbon and strong emission lines of oxygen O VI 3811-34 Å. In theoretical models, a W-R star whose carbon abundance at surface is larger than nitrogen abundance and has the abundance ratio (C + O) / He > 1 (in number). W short for Wolf-Rayet star, O for → oxygen. |
WO1 type setâre-ye WO1 Fr.: étoile WO1 An oxygen-rich → Wolf-Rayet star whose spectrum shows the following emission line characteristics: No O IV 3400 Å, strong O VI 3811-34 Å, O V 5572-98 Å about or stronger than C IV 5801-12 Å, no C III 5696 Å. W, from → Wolf-Rayet; O, from → oxygen; → star. |
WO2 type setâre-ye WO2 Fr.: étoile WO2 An oxygen-rich → Wolf-Rayet star whose spectrum shows the following emission line characteristics: No O IV 3400 Å, strong O VI 3811-34 Å, O V 5572-98 Å weaker than C IV 5801-12 Å, no C III 5696 Å. W, from → Wolf-Rayet; O, from → oxygen; → star. |
