A wavelet-transform-based method for the automatic detection of late-type stars

CASIA OpenIR > 09年以前成果

	A wavelet-transform-based method for the automatic detection of late-type stars
	Liu, ZT ; Zhao, RZ ; Zhao, YH ; Wu, FC
发表期刊	SPECTROSCOPY AND SPECTRAL ANALYSIS
	2005-07-01
卷号	25 期号:7 页码:1158-1161
文章类型	Article
摘要	The 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.
关键词	Wavelet Transform Late-type Stars Astronomical Spectra Molecule Absorption Bands
WOS标题词	Science & Technology ; Technology
收录类别	SCI
语种	英语
WOS研究方向	Spectroscopy
WOS类目	Spectroscopy
WOS记录号	WOS:000231098900040
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/9187
专题	09年以前成果
作者单位	1.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
推荐引用方式 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.