晚型星计算机自动光谱分类  

Automatic Spectral Classification ofLow-Mass Late-Type Stars

作　　者：李金增[1,2] 李金增[1,2] 胡景耀 胡景耀[1,2] 

机构地区：[1]中国科学院北京天文台,北京100080 [2]中国科学院国家天文观测中心,北京100012

出　　处：《天体物理学报》1999年第3期297-302,共6页

摘　　要：在对恒星形成区（ＳＦＲ）中ＲＯＳＡＴ选弱发射线ＴＴａｕｒｉ星（ＷＴＴＳ）进行光谱证认的过程中，发展了一套基于北京天文台２．１６米光学望远镜及其ＯＭＲ卡焦光谱仪系统的晚型星中色散（５０Ａ／ｍｍ）光谱计算机自动光谱分类方法．对ＲＯＳＡＴ选ＷＴＴＳ候选作中晚型星进行自动光谱分类的结果表明，一般情况下，光谱型的分类精度可达±１个次级，个别源为±２个次级．该自动光谱分类方法同时适用于其他光谱晚型星．n the course of optical idelltification of ROSAT selected weak-line T Tauri stars(WTTS) spectra were taken for a set of MK standards alongside the program stars withthe same instrumental set-up, the 2.16m optical telescope, the OMR (Optomechanics Research Inc.) spectrograph and the TEK 1024 CCD detector. All the data were reducedby the NOAO Image Reduction and Analysis Facility (IRAF) software packages and thennormalized for the purpose of spectral classification. Corresponding spectral classificationof the optical coullterparts of the ROSAT selected WTTS was carried out. Accuracy ofthe automatic spectral classification is expected to be sub-class in most cases, which issufficient for optical identification. This method of automatic classification is applicable tomedium-dispersion (50A/mm) spectra of other late-type stars.

关 键 词：晚型恒星 光谱标准系列 自动光谱分类 计算机 

分 类 号：P144.1[天文地球—天体物理] P145.4[天文地球—天文学]