翻訳と辞書 Words near each other ・ Ab Khvordeh ・ Ab Klink ・ Ab Kolah ・ Ab Kolok ・ Ab Konar ・ Ab Konar, Khuzestan ・ Ab Konaru, Fars ・ Ab Koreh ・ Ab Koreh Tal ・ Ab Kori ・ Ab Korik ・ Ab Difeh, Lorestan ・ Ab Dilli Dur Nahin ・ AB Disques ・ Ab Donbal ・ AB Doradus ・ AB Doradus moving group ・ Ab Douglas ・ Ab Dozduiyeh ・ Ab Ekels ・ Ab Fafié ・ AB Felix ・ Ab Gaj ・ Ab Gandu ・ Ab Gareyu ・ Ab Garm, Arzuiyeh ・ Ab Garm, Bam ・ Ab Garm, Hoseynabad ・ Ab Garm, Isfahan ・ Ab Garm, Khur and Biabanak 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 AB Doradus ： ウィキペディア英語版 AB Doradus AB Doradus is a pre-main-sequence trinary star system in the constellation Dorado. The primary is a flare star that shows periodic increases in activity. The primary star in this system spins at a rate 50 times that of the Sun, and consequently has a strong magnetic field. It has a greater number of star spots than the Sun. These can cause the luminosity of the star to appear to vary over each orbital cycle. Measurements of the spin rate of this star at its equator have shown that it varies over time due to the effect of this magnetic field.〔 ((The AB Dor Picture Gallery ))〕 The system has three components. The binary star AB Doradus B orbits the primary at an average distance of 135 astronomical units (AUs). AB Doradus C, is a close-in companion that orbits the primary at a distance of 2.3 AU, and has an orbital period of 11.75 years. The third star is among the lowest-mass stars ever found. At an estimated mass 93 times Jupiter's, it is near the limit of 75–83 Jupiter masses below which it would be classified as a brown dwarf. This system is a member of the eponymous AB Doradus Moving Group, a loose stellar association of about 30 stars that are all approximately the same age and moving in the same general direction. It is likely that all of these stars formed in the same giant molecular cloud. ==References== 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「AB Doradus」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.