Searching for Dwarf Nova Candidates with Automatic Methods in Massive Spectra
WANG Wen-yu1, 2, WANG Xin-jun2*, PAN Jing-chang1
1. School of Computer Science and Technology, Shandong University, Ji’nan 250100, China 2. School of Mechanical, Electrical&Information Engineering, Shandong University at Weihai, Weihai 264209, China
Abstract：In the present paper, an automatic and efficient method for searching for dwarf nova candidates is presented. The methods PCA (principal component analysis) and SVM (support vector machine) are applied in the newly released SDSS-DR9 spectra. The final dimensions of the feature space are determined by the identification accuracy of training samples with different dimensions constrained by SVM. The massive spectra are dimension reduced by PCA at first and classified by the best SVM classifier. The final less number of candidates can be identified manually. A total number of 276 dwarf nova candidates are selected by the method and 6 of them are new discoveries which prove that our approach to finding special celestial bodies in massive spectra data is feasible. The new discoveries of this paper are added in the current dwarf nova template library which can contribute to constructing a more accurate feature space. The method proposed in this paper can also be used for special objects searching in other sky survey telescopes like Guoshoujing (Large Sky Area Multi-Object Fiber Spectroscopic Telescope -LAMOST) telescope.
王文玉1, 2, 王新军2*，潘景昌1 . 矮新星候选体的自动搜索研究 [J]. 光谱学与光谱分析, 2013, 33(12): 3411-3414.
WANG Wen-yu1, 2, WANG Xin-jun2*, PAN Jing-chang1 . Searching for Dwarf Nova Candidates with Automatic Methods in Massive Spectra . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(12): 3411-3414.
[1] Dawson Kyle S, Schlegel David J, Ahn Christopher P, et al. The Astronomical Journal, 2013, 145(1): 41. [2] Anderson Lauren, Aubourg Eric, Bailey StephenMonthly, et al. Notices of the Royal Astronomical Society, 2012，427：3435. [3] Ramsay Gavin, Cannizzo John K, Howell Steve B, et al. Monthly Notices of the Royal Astronomical Society, 2012, 425: 1479. [4] Thorstensen John R, Skinner Julie N. The Astronomical Journal, 2012, 144: 81. [5] Bolton Adam S, Schlegel David J, Aubourg Eric, et al. The Astronomical Journal, 2012, 144(5): 20. [6] Szkody P, et al. The Astronomical Journal, 2007, 134: 185. [7] Tojeiro Rita, Percival Will J, Brinkmann Jon, et al. Monthly Notices of the Royal Astronomical Society, 2012, 424(3): 2339. [8] Lee Khee-Gan, Suzuki Nao, Spergel David N. The Astronomical Journal, 2012, 143: 51. [9] Szkody P, Anderson Scott F, Brooks Keira, et al. The Astronomical Journal, 2011, 142: 181. [10] Ross Nicholas P, Myers Adam D, Sheldon Erin S, et al. The Astrophysical Journal Supplement, 2012, 199(1): 29. [11] Aihara Hiroaki, Allende Prieto Carlos, An Deokkeun, et al. The Astrophysical Journal Supplement, 2011, 193(2): 17.
