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An Analysis of Outlier Spectrum: LAMOST J140242. 45+092049. 8
Yang Hai-feng1; Cai Jiang-hui1; Zhang Ji-fu1; Luo A -li2; Zhao Xu-jun1; Yang Yu-qing1
AbstractLAMOST regular survey has successfully observed more than 100, 000 galaxy spectra, which provides important data for mining the precious and rare objects to improve the existing theories. In this paper, the spectrum J140242. 45+092049. 8 is particularly chosen from LAMOST DR3 by using the outlier mining method based on the relevant subspaceand intensively discussed these rare characteristics respectively. First of all, the dual-redshift system (absorption system: z(1)=0. 020 95, emission system: z(2)=0. 069 5) are measured and identified by fuzzilyrecognizing the characteristics lines and cross matching the information of the homologous spectrum observed with SDSS. As a whole, the Delta z<0. 048, which is far greater than the physical interacting threshold (Delta z<0. 008) provided with Keel, indicating that they are superimposed in the light of sight rather than physical interacting occurring between the foreground galaxy and background one, and the possibility of lens for such "absorption+emission" mode dual-redshift spectrum is illuminated by studying the availableliterature and analyzing the image feature provided with SDSS. For the foreground galaxy (absorption system), the strong Balmer absorption lines and iron lines appeared simultaneously-in the spectrumimplies that this object will be most likely be E+A galaxy. For the background galaxy (emission system), the characteristic of double peak emission lines is analyzed and the strange relationship between the emission lines is also discussed in the end.
KeywordDual-redshift Systems Lens Galaxy Pairs Outlier Mining
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000400041300051
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Document Type期刊论文
Affiliation1.Taiyuan Univ Sci & Technol, Sch Comp Sci & Technol, Taiyuan 030024, Peoples R China
2.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
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Yang Hai-feng,Cai Jiang-hui,Zhang Ji-fu,et al. An Analysis of Outlier Spectrum: LAMOST J140242. 45+092049. 8[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2017,37(4):1269-1273.
APA Yang Hai-feng,Cai Jiang-hui,Zhang Ji-fu,Luo A -li,Zhao Xu-jun,&Yang Yu-qing.(2017).An Analysis of Outlier Spectrum: LAMOST J140242. 45+092049. 8.SPECTROSCOPY AND SPECTRAL ANALYSIS,37(4),1269-1273.
MLA Yang Hai-feng,et al."An Analysis of Outlier Spectrum: LAMOST J140242. 45+092049. 8".SPECTROSCOPY AND SPECTRAL ANALYSIS 37.4(2017):1269-1273.
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