类星体对的Lyman-α吸收线和发射线的相互关系(英文)  

Relation between the Lyman-α Emission and Absorption Lines of Quasar Pairs

作　　者：李有兵[1] 吕连忠[2] 彭青松[1] 

机构地区：[1]广州大学天体物理中心,广州510006 [2]广西大学物理学院,广西南宁530004

出　　处：《天文研究与技术》2008年第4期323-329,共7页Astronomical Research & Technology

基　　金：广西大学自然科学研究基金(GrantNo.X071130)

摘　　要：通过探究类星体对的Lyman-α的吸收线和发射线的等值宽度,研究了它们之间可能存在的相互关系。研究了来自SDSS巡天的12对中等分辨率的类星体对。发现Lyman-α的发射线和吸收线的等值宽度没有任何的相关性。它支持了前人的建议,即背景类星体的Lyman-α吸收线来自前景类星体附近的光学厚吸收体,而Lyman-α的发射线来自前景类星体本身。We investigated the relation between the Lyman-α emission and absorption lines of quasar pairs by exploring possible correlation between the equivalent widths of the two kinds of lines. We used 12 moderately resolved quasar pairs from the Sloan Digitized Sky Survey （SDSS） for the study, where the equivalent widths of the Lyman-α emission lines of the foreground quasars are available in literature. The equivalent widths of the corresponding Ly-α absorption lines of the background quasars were measured from their spectra data downloaded from the SDSS web-site. We found no correlation between rest-frame equivalent widths of the Ly-α emission and absorption lines, favoring the previous suggestion that the Ly-α absorption lines in background quasars are due to optically thick absorbers near the foreground quasars, and the Ly-α emission lines originate from the foreground quasars themselves.

关 键 词：类星体 吸收线 发射线 相关性分析 

分 类 号：P158[天文地球—天文学]