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Fast Automatic Redshift Determination Using Absorption Lines Recognition
Han, Jin-Shu1,2,3; Luo, A-Li1; Zha, Yong-Heng1
2011
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
卷号63期号:6页码:1313-1330
摘要To precisely measure the redshifts of non-ELGs (ELGs: emission-line galaxies), weaker-ELGs and galaxies with only one emission line that is clearly visible in the optical band, a fast automatic redshift determination algorithm (FRA) is proposed, which is different from the widely used cross-correlation method. The algorithm has higher speed because it determines the redshift by extracting and recognizing two pairs of prominent absorption lines in the blue band of a spectrum, G-band lambda 4306 and H gamma lambda 4342 (vacuum wavelength), H beta lambda 4863 and Mg lambda 5177, rather than through matching an observational galaxy spectrum with the complete galaxy templates. Moreover, a wide range of redshift measurements from 0 to 0.65 and relatively high success rates can be reached by FRA. For spectra with a relatively wide wavelength range and with a resolution above R = 1000, FRA is an efficient automatic algorithm that can be used in spectra redshift surveys with large amounts of data.
关键词Cosmology: Distance Scale Cosmology: Observations Methods: Data Analysis Techniques: Spectroscopic
收录类别SCI
语种英语
WOS记录号WOS:000299764600017
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7915
专题光学天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Dezhou Univ, Dept Comp Sci & Technol, Dezhou 253020, Peoples R China
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Han, Jin-Shu,Luo, A-Li,Zha, Yong-Heng. Fast Automatic Redshift Determination Using Absorption Lines Recognition[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2011,63(6):1313-1330.
APA Han, Jin-Shu,Luo, A-Li,&Zha, Yong-Heng.(2011).Fast Automatic Redshift Determination Using Absorption Lines Recognition.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,63(6),1313-1330.
MLA Han, Jin-Shu,et al."Fast Automatic Redshift Determination Using Absorption Lines Recognition".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 63.6(2011):1313-1330.
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