基于谱线检测的发射线星自动识别方法  

A Method for Automatic Recognition of Emission-Line Stars Based on Detection of Spectral Lines

作　　者：刘中田[1] 邱宽民[1] 杨金福[2] 

机构地区：[1]北京交通大学电子信息工程学院自动控制工程系,北京100044 [2]北京工业大学电子信息与控制工程学院自动化系,北京100022

出　　处：《光学学报》2008年第6期1101-1105,共5页Acta Optica Sinica

基　　金：国家863计划(2003AA133060);北京交通大学科技基金(2006RC028)资助课题

摘　　要：针对我国即将建成的大型巡天项目(LAMOST),给出了一种基于谱线检测的发射线星自动识别方法。主要步骤:1)通过获取谱线特征匹配值进行恒星谱线整体估计;2)利用提取出的恒星谱线特征检测恒星的巴耳末(Balmer)线;3)对获取的特征匹配值采用阈值法,并结合恒星Balmer线的检测结果,进行发射线星判别。通过对SDSSDR4所有光谱进行识别,共获得了242条具有恒星发射线的特殊天体。根据星表查询结果,这些天体包括发射线星、激变变星和一些未知特殊天体等。大量真实光谱数据实验表明,本文方法可有效识别发射线星。Aiming at the LAMOST project,the largest sky survey project implemented in China,a novel method for automatic recognition of emission-line stars（ELS）based on detection of spectral lines is proposed.This method consists of three main steps：1）the integral information of spectral lines is calculated by obtaining the correlations of the features of spectral lines;2）the stellar Balmer lines are detected based on the features of stellar spectral lines;3）the ELSs are automatically recognized by using the threshold of the correlations and the results of the stellar Balmer lines.In the experiments with all observed spectra from the sloan digital sky survey（SDSS）DR4,242 peculiar celestial bodies with the stellar emission lines are obtained.According to the Simbad reference database,they are the celestial bodies include ELSs,cataclysmic variable stars（CVS）,and unknown peculiar celestial bodies,etc..The extensive experiments with observed spectra show that the proposed method can automatically recognize ELS effectively.

关 键 词：模式识别 特殊天体 发射线星 谱线检测 小波变换 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]