SDSS甚高红移类星体MgⅡ吸收线初步证认  

Identification of the very High Redshift(z_(em)>4.7) quasar absorption lines

作　　者：黎木胜[1] 潘彩娟[2] 廖容花[1] 黄伟荣[1] 钟榆青[1] 王美萍[1] 李嘉良[1] 

机构地区：[1]广州大学物理与电子工程学院,广东广州510006 [2]百色学院物理与电信工程系,广西百色533099

出　　处：《百色学院学报》2012年第6期104-108,共5页JOURNAL OF BAISE UNIVERSITY

基　　金：广西自然科学基金面上项目(2012jjAA10090)

摘　　要：文章利用美国SDSS望远镜观测的类星体光谱,在IDL可视化程序平台中进行处理,处理过程包括消光改正、扣除连续谱和铁谱、扣除发射线、认证吸收线等。通过对甚高红移(Zem>4.7)类星体光谱的分析,证认出281个MgⅡλλ2796,2803双线吸收系统。By analyzing quasar absorption lines,we are able to get information of the ab- sorber redshift, density, temperature,abundance of elements, etc.. These data are useful for stud- ying the structure and evolution of the universe. We download the data of of quasar spectra observed by the sloan digital sky survey（SDSS） telescope in USA,and analyze them in a IDL visualization program platform. The process of analysis includes the extinction correction and the co-moving frame correction,taking out the continuous,the iron emission,and the emission lines,as well as the identification of absorption lines. In this way,we have identified 281 Mg II double absorption systems.

关 键 词：类星体 吸收线 红移 

分 类 号：P157.2[天文地球—天文学]