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A Search for Double-peaked narrow emission line Galaxies and AGNs in the LAMOST DR1

  • Shi, Zhi-Xin
  • Luo, A-Li
  • Comte, Georges
  • Chen, Xiao-Yan
  • Zhao, Yong-Heng
  • Wu, Fu-Chao
  • Zhang, Yan-Xia
  • Shen, Shi-Yin
  • Yang, Ming
  • Wu, Hong
  • Wu, Xue-Bing
  • Zhang, Hao-Tong
  • Lei, Ya-Juan
  • Zhang, Jian-Nan
  • Wang, Ting-Gui
  • Jin, Ge
  • Zhang, Yong
Publication Date
Apr 28, 2014
Submission Date
Apr 28, 2014
DOI: 10.1088/1674-4527/14/10/003
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LAMOST has released more than two million spectra, which provide the opportunity to search for double-peaked narrow emission line (NEL) galaxies and AGNs. The double-peaked narrow-line profiles can be well modeled by two velocity components, respectively blueshifted and redshifted with respect to the systemic recession velocity. This paper presents 20 double-peaked NEL galaxies and AGNs found from LAMOST DR1 using a search method based on multi-gaussian fit of the narrow emission lines. Among them, 10 have already been published by other authors, either listed as genuine double-peaked NEL objects or as asymmetric NEL objects, the remaining 10 being first discoveries. We discuss some possible origins for double-peaked narrow-line features, as interaction between jet and narrow line regions, interaction with companion galaxies and black hole binaries. Spatially resolved optical imaging and/or follow-up observations in other spectral bands are needed to further discuss the physical mechanisms at work.

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