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Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning
Si JianMin1,2,3; Luo ALi2,3; Li YinBi2; Zhang JianNan2; Wei Peng2,3; Wu YiHong1; Wu FuChao1; Zhao YongHeng2
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
2014
Volume57Issue:1Pages:176-186
SubtypeArticle
AbstractCarbon 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.
KeywordMachine Learning Label Propagation Carbon Stars Dz White Dwarfs
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordDIGITAL SKY SURVEY ; SUPERNOVA CANDIDATES ; STELLAR SPECTRA ; MILKY-WAY ; LATITUDE ; CATALOG ; COOL ; KPC
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000328879500022
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ia.ac.cn/handle/173211/2999
Collection模式识别国家重点实验室_机器人视觉
Affiliation1.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
First Author AffilicationChinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100190, Peoples R China
Recommended Citation
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.
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