NAOC Open IR
Two Portions of the Sagittarius Stream in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap
Zhao,J. K.1; Ye,X. H.1,2; Wu,H.1,2; Yang,M.1,3; Oswalt,Terry D.4; Xue,X. X.1; Chen,Y. Q.1,2; Zhang,J. J.1,2; Zhao,G.1,2
2020-11-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume904Issue:1
AbstractAbstract We constructed a sample of 13,798 stars with Teff, log g, [Fe/H], radial velocity, proper motions, and parallaxes from LAMOST DR5 and Gaia DR2 in the LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) at the Southern Galactic Cap consisting of areas A and B. Using the distributions in both proper motions and radial velocity, we detected very significant overdensities in these two areas. These substructures most likely are portions of the Sagittarius (Sgr) stream. With the Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm, 220 candidates stream members were identified. Based upon distance to the Sun and published models, 106 of these stars are likely to be the members of the Sgr stream. The abundance pattern of these members using [α/Fe] from Xiang et al. were found to be similar to Galactic field stars with [Fe/H]? ?1.0. No vertical and only small radial gradients in metallicity along the orbit of the Sgr stream were found in our Sgr stream candidates.
KeywordStellar abundances Galaxy kinematics
DOI10.3847/1538-4357/abbc1f
Language英语
WOS IDIOP:0004-637X-904-1-abbc1f
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/62457
Collection中国科学院国家天文台
Corresponding AuthorZhao,J. K.
Affiliation1.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences Beijing 100101, People’s Republic of China; zjk@nao.cas.cn, hwu@nao.cas.cn, myang@nao.cas.cn
2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
3.IAASARS, National Observatory of Athens, Vas. Pavlou and I. Metaxa, Penteli 15236, Greece
4.Embry-Riddle Aeronautical University, Aerospace Boulevard, Daytona Beach, FL 32114, USA; oswaltt1@erau.edu
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao,J. K.,Ye,X. H.,Wu,H.,et al. Two Portions of the Sagittarius Stream in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap[J]. The Astrophysical Journal,2020,904(1).
APA Zhao,J. K..,Ye,X. H..,Wu,H..,Yang,M..,Oswalt,Terry D..,...&Zhao,G..(2020).Two Portions of the Sagittarius Stream in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap.The Astrophysical Journal,904(1).
MLA Zhao,J. K.,et al."Two Portions of the Sagittarius Stream in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap".The Astrophysical Journal 904.1(2020).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhao,J. K.]'s Articles
[Ye,X. H.]'s Articles
[Wu,H.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhao,J. K.]'s Articles
[Ye,X. H.]'s Articles
[Wu,H.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhao,J. K.]'s Articles
[Ye,X. H.]'s Articles
[Wu,H.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.