Data Mining Approach to Cataclysmic Variables Candidates Based on Random Forest Algorithm
JIANG Bin1,2,3, LUO A-li1, ZHAO Yong-heng1
1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2. School of Mechanical, Electrical&Information Engineering, Shandong University at Weihai, Weihai 264209, China 3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：An automatic and efficient method for cataclysmic variables candidates is presented in the present paper. The identified CVs were selected as templates. A model was constructed by random forest algorithm with templates and random selected spectra. Wavelength ranking was described by the model and the classifier was constructed afterwards. Most of the non-candidates were excluded by the method. Template matching strategy was used to identify the final candidates which were analyzed to complement the templates as feedback. 16 new CVs candidates were found in the experiment that shows that our approach to finding special celestial bodies can be feasible in LAMOST.
[1] Ronald A. Downes. A Catalog and Atlas of Cataclysmic Variables: The Final Edition. The Journal of Astronomical Data, 2005: 11, 2. [2] Szkody P, et al. The Astronomical Journal, 2002, 123: 430. [3] Szkody P, et al. The Astronomical Journal, 2003, 126: 1499. [4] Szkody P, et al. The Astronomical Journal, 2004, 128: 1882. [5] Szkody P, et al. The Astronomical Journal, 2005, 129: 2386. [6] Szkody P, et al. The Astronomical Journal, 2006, 131: 973. [7] Szkody P, et al. The Astronomical Journal, 2007, 134: 185. [8] Patrick Wils. Monthly Notices of the Royal Astronomical Society, V402, Issue 1, 436. [9] LI Zong-yun, LIU Wu, HU Jing-yao(李宗云, 刘 武, 胡景耀). Acta Astronomical Sinica(天文学报), 1999, 40(1): 1. [10] Frederick Livingston. Implementation of Breiman’s Random Forest Machine Learning Algorithm ECE591Q Machine Learning Journal Paper. Fall 2005. [11] TU Liang-ping. Research in Astronomy and Astrophysics, 2009, 9(6): 635. [12] Abazajian K. The Astrophysical Journal Supplement, 2009, 182(2): 543.
