Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning

	Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning
	Si JianMin 1,2,3; Luo ALi 2,3; Li YinBi 2; Zhang JianNan 2; Wei Peng 2,3; Wu YiHong1 ; Wu FuChao1 ; Zhao YongHeng 2
发表期刊	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2014
卷号	57 期号:1 页码:176-186
文章类型	Article
摘要	Carbon stars and DZ white dwarfs are two types of rare objects in the Galaxy. In this paper, we have applied the label propagation algorithm to search for these two types of stars from Data Release Eight (DR8) of the Sloan Digital Sky Survey (SDSS), which is verified to be efficient by calculating precision and recall. From nearly two million spectra including stars, galaxies and QSOs, we have found 260 new carbon stars in which 96 stars have been identified as dwarfs and 7 identified as giants, and 11 composition spectrum systems (each of them consists of a white dwarf and a carbon star). Similarly, using the label propagation method, we have obtained 29 new DZ white dwarfs from SDSS DR8. Compared with PCA reconstructed spectra, the 29 findings are typical DZ white dwarfs. We have also investigated their proper motions by comparing them with proper motion distribution of 9,374 white dwarfs, and found that they satisfy the current observed white dwarfs by SDSS generally have large proper motions. In addition, we have estimated their effective temperatures by fitting the polynomial relationship between effective temperature and g-r color of known DZ white dwarfs, and found 12 of the 29 new DZ white dwarfs are cool, in which nine are between 6,000 K and 6,600 K, and three are below 6,000 K.
关键词	Machine Learning Label Propagation Carbon Stars Dz White Dwarfs
WOS标题词	Science & Technology ; Physical Sciences
关键词[WOS]	DIGITAL SKY SURVEY ; SUPERNOVA CANDIDATES ; STELLAR SPECTRA ; MILKY-WAY ; LATITUDE ; CATALOG ; COOL ; KPC
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000328879500022
引用统计	被引频次：20[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/173211/2999
专题	多模态人工智能系统全国重点实验室_机器人视觉
作者单位	1.Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	模式识别国家重点实验室
推荐引用方式 GB/T 7714	Si JianMin,Luo ALi,Li YinBi,et al. Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2014,57(1):176-186.
APA	Si JianMin.,Luo ALi.,Li YinBi.,Zhang JianNan.,Wei Peng.,...&Zhao YongHeng.(2014).Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,57(1),176-186.
MLA	Si JianMin,et al."Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 57.1(2014):176-186.