|
|
|
|
|
|
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 |
1. School of Computer Science and Technology,Taiyuan University of Science and Technology, Taiyuan 030024, China
2. Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China |
|
|
Abstract LAMOST 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: z1=0.020 95, emission system: z2=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 Δz=0.048, which is far greater than the physical interacting threshold (Δz<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 simultaneouslyin 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.
|
Received: 2016-10-31
Accepted: 2017-03-10
|
|
Corresponding Authors:
CAI Jiang-hui
E-mail: jianghui@tyust.edu.cn
|
|
[1] Luo A L, Zhao Y H, Zhao G, et al. Research in Astronomy and Astrophysics, 2015, 15(8): 1095.
[2] Cui X Q, Zhao Y H, Chu Y Q, et al. Research in Astronomy and Astrophysics, 2012, 12(9): 1197.
[3] Shi Z X, Luo A L, Comte G, et al. Research in Astronomy and Astrophysics, 2014, 14(10): 1234.
[4] Shi Z X, Comte G, Luo A L, et al. Astronomy & Astrophysics, 2014, 564: A89.
[5] Huang Y, Liu X W, Yuan H B, et al. Monthly Notices of the Royal Astronomical Socieuy, 2014: stu334.
[6] Yang H F, Luo A L, Chen X Y, et al. Research in Astronomy and Astrophysics, 2015, 15(8): 1414.
[7] Shen S Y, Argudo-Fernández M, Chen L, et al. Research in Astronomy and Astrophysics, 2016, 16(3): 7.
[8] Yang H, Luo A, Chen X, et al. Monthly Notices of the Royal Astronomical Society, 2014, 444(3): 2456.
[9] Holwerda B W, Baldry I K, Alpaslan M, et al. Monthly Notices of the Royal Astronomical Society, 2015, 449(4): 4277.
[10] Zhang J, Yu X, Li Y, et al. Knowledge-Based Systems, 2016, 99: 1.
[11] Geller M J, Kenyon S J, Barton E J, et al. The Astronomical Journal, 2006, 132(6): 2243.
[12] Keel W C, Manning A M, Holwerda B W, et al. Publications of the Astronomical Society of the Pacific, 2013, 125(923): 2.
[13] Smith A G, Hopkins A M, Hunstead R W, et al. Monthly Notices of the Royal Astronomical Society, 2012, 422(1): 25.
[14] Raskutti S, Greene J E, Murphy J D. The Astrophysical Journal, 2014, 786(1): 23. |
[1] |
WU Ming-lei1, PAN Jing-chang1*, YI Zhen-ping1, WEI Peng2. A Method to Search Special Stellar Spectra from Low Signal-to-Noise Ratio Spectral Sky Survey Data[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 39(02): 618-621. |
[2] |
WANG Guang-pei1, PAN Jing-chang1*, YI Zhen-ping1, WEI Peng2, JIANG Bin1 . Outlier Data Mining and Analysis of LAMOST Stellar Spectra in Line Index Feature Space[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(10): 3364-3368. |
[3] |
LIU Zhong-bao1, ZHAO Wen-juan2 . Study on Stellar Spectral Outliers Mining Based on Fuzzy Large Margin and Minimum Ball Classification Model [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(04): 1245-1248. |
[4] |
ZHANG Ji-fu,ZHANG Su-lan,JIANG Yi-yong. The Local Outliers Mining System of Celestial Body Spectrum Based on Constrained Concept Lattice[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(02): 551-555. |
[5] |
ZHANG Ji-fu1, 2,CAI Jiang-hui1 . A Study on the Outlier Mining System for LAMOST Spectra[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(03): 606-609. |
|
|
|
|