A sample of galaxy pairs identified from the LAMOST spectral survey and the Sloan Digital Sky Survey

Shi Yin Shen, Maria Argudo-Fernández, Li Chen, Xiao Yan Chen, Shuai Feng, Jin Liang Hou, Yong Hui Hou, Peng Jiang, Yi Peng Jing, Xu Kong, A. Li Luo, Zhi Jian Luo, Zheng Yi Shao, Ting Gui Wang, Wen Ting Wang, Yue Fei Wang, Hong Wu, Xue Bing Wu, Hai Feng Yang, Ming YangFang Ting Yuan, Hai Long Yuan, Hao Tong Zhang, Jian Nan Zhang, Yong Zhang

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23 Scopus citations


A small fraction (< 10%) of the SDSS main galaxy (MG) sample has not been targeted with spectroscopy due to the effect of fiber collisions. These galaxies have been compiled into the input catalog of the LAMOST ExtraGAlactic Surveys and named the complementary galaxy sample. In this paper, we introduce this project and status of the spectroscopies associated with the complementary galaxies in the first two years of the LAMOST spectral survey (till Sep. of 2014). Moreover, we present a sample of 1102 galaxy pairs identified from the LAMOST complementary galaxies and SDSS MGs, which are defined as two members that have a projected distance smaller than 100 h-170kpc and a recessional velocity difference smaller than 500 km s-1. Compared with galaxy pairs that are only selected from SDSS, the LAMOST-SDSS pairs have the advantages of not being biased toward large separations and therefore act as a useful supplement in statistical studies of galaxy interaction and galaxy merging.

Original languageEnglish
Article number43
JournalResearch in Astronomy and Astrophysics
Issue number3
StatePublished - Mar 2016
Externally publishedYes


  • galaxies: groups: general
  • galaxies: interactions


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