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A wavelet-transform-based method for the automatic detection of late-type stars
Liu, ZT; Zhao, RZ; Zhao, YH; Wu, FC
2005-07-01
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
Volume25Issue:7Pages:1158-1161
AbstractThe LAMOST project, the world largest sky survey project, urgently needs an automatic late-type stars detection system. However, to our knowledge, no effective methods for automatic late-type stars detection have been reported in the literature up to now. The present study work is intended to explore possible ways to deal with this issue. Here, by "late-type stars" we mean those stars with strong molecule absorption bands, including oxygen-rich M, L and T type stars and carbon-rich C stars. Based on experimental results, the authors find that after a wavelet transform with 5 scales on the late-type stars spectra, their frequency spectrum of the transformed coefficient on the 5(th) scale consistently manifests a unimodal distribution, and the energy of frequency spectrum is largely concentrated on a small neighborhood centered around the unique peak. However, for the spectra of other celestial bodies, the corresponding frequency spectrum is of multimodal and the energy of frequency spectrum is dispersible. Based on such a finding, the authors presented a wavelet-transform-based automatic late-type stars detection method. The proposed method is shown by extensive experiments to be practical and of good robustness.
KeywordWavelet Transform Late-type Stars Astronomical Spectra Molecule Absorption Bands
Indexed BySCI
Language英语
WOS IDWOS:000231098900040
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8941
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Natl Lab Pattern Recognit, Inst Automat, Beijing 100080, Peoples R China
2.Beijing Jiaotong Univ, Sch Comp & Informat Technol, Beijing 100044, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Liu, ZT,Zhao, RZ,Zhao, YH,et al. A wavelet-transform-based method for the automatic detection of late-type stars[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2005,25(7):1158-1161.
APA Liu, ZT,Zhao, RZ,Zhao, YH,&Wu, FC.(2005).A wavelet-transform-based method for the automatic detection of late-type stars.SPECTROSCOPY AND SPECTRAL ANALYSIS,25(7),1158-1161.
MLA Liu, ZT,et al."A wavelet-transform-based method for the automatic detection of late-type stars".SPECTROSCOPY AND SPECTRAL ANALYSIS 25.7(2005):1158-1161.
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