摘要
恒星光谱一般具有明显的吸收线或者吸收带特征,而具有发射线的恒星光谱对应着特殊类型的恒星,如激变变星、Herbig Ae/Be等。对这些光谱的后续研究有着重要的意义。本文提出了一种能够自动识别发射线恒星光谱的方法。该方法首先对光谱进行连续谱归一化,然后通过比较谱线对应的流量及其邻域流量的均值和标准差,来判断是否存在发射线。对SDSS DR8大样本数据的实验表明,该方法能够完整、准确地识别发射线恒星。而且,由于该方法不涉及复杂的变换和运算,因而识别速度非常快,可用于诸如LAMOST和SDSS这样大型光谱巡天项目中发现发射线恒星光谱。
Stellar spectra are characterized by obvious absorption lines or absorption bands,while those with emission lines are usually special stars such as cataclysmic variable stars（CVs）,HerbigAe/Be etc.The further study of this kind of spectra is meaningful.The present paper proposed a new method to identify emission line stars（ELS） spectra automatically.After the continuum normalization is done for the original spectral flux,line detection is made by comparing the normalized flux with the mean and standard deviation of the flux in its neighbor region.The results of the experiment on massive spectra from SDSS DR8 indicate that the method can identify ELS spectra completely and accurately.Since no complex transformation and computation are involved in this method,the identifying process is fast and it is ideal for the ELS detection in large sky survey projects like LAMOST and SDSS.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2012年第6期1689-1693,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(10973021,11078013,61020106001)资助
