| Abstract: | The Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST) has released more than two million spectra,which provide the opportunity to search for double-peaked narrow emission line(NEL) galaxies and active galactic nuclei(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 a multi-Gaussian fit of the narrow emission lines.Among them,ten have already been published by other authors,either listed as genuine double-peaked NEL objects or as asymmetric NEL objects,and the remaining ten are original discoveries.We discuss some possible origins for the double-peaked narrow-line features,such 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. |
