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

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.