|
HE1327-2326, discovered in 2005 by Anna Frebel and collaborators, was the star with the lowest known iron abundance until SMSS J031300.36-670839.3 was discovered. The star is a member of Population II stars, with an iron to hydrogen ratio (()), or metallicity, of −5.6. This number indicates that its iron content is 1/400,000 that of the Earth's sun. However, it has a carbon abundance of roughly one-tenth solar (() = −1.0), and it is not known how these two abundances can be produced simultaneously. Discovered by the Hamburg/ESO survey for metal-poor stars, it was probably formed during an age of the universe when the metal content was much lower. It has been speculated that this star is part of the second generation, born out of the gas clouds which were polluted by the primordial Population III stars. == See also == ;Ultra low metallicity / ultra metal poor stars * Cayrel's Star * HE0107-5240 * SDSS J102915+172927 * SMSS J031300.36-670839.3 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「HE 1327-2326」の詳細全文を読む スポンサード リンク
|