A search for double-peaked narrow emission line galaxies and AGNs in the LAMOST DR1

查看全文 作　　者：Zhi-Xin [1,2,3]Shi;A-Li [1]Luo;Georges [1,4]Comte;Xiao-Yan [1]Chen;Peng [1,3]Wei;Yong-Heng [1]Zhao;Fu-Chao [2]Wu;Yan-Xia [1]Zhang;Shi-Yin [5]Shen;Ming [1]Yang;Hong [1]Wu;Xue-Bing [6]Wu;Hao-Tong [1]Zhang;Ya-Juan [1]Lei;Jian-Nan [1]Zhang;Ting-Gui [7]Wang;Ge [7]Jin;Yong [8]Zhang 机构地区：[1]Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences;[2]National Laboratory of Pattern Recognition,Institute of Automation,Chinese Academy of Sciences;[3]University of Chinese Academy of Sciences;[4]Aix-Marseille Universite&CNRS,Institut Pytheas,LAM(Laboratoire d'Astrophysique de Marseille),UMR7326,F-13388 Marseille;[5]Shanghai Astronomical Observatory,Chinese Academy of Sciences;[6]Department of Astronomy,Peking University;[7]University of Science and Technology of China;[8]Nanjing Institute of Astronomical Optics & Technology,National Astronomical Observatories,Chinese Academy of Sciences 出　　处：《Research in Astronomy and Astrophysics》索引2014年第14卷第10期,共17页 基　　金：Supported by the National Natural Science Foundation of China 摘　　要：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. 关 键 词：LAMOST 活动星系核 发射线星系 搜索方法 DR1 速度分量 天文望远镜 大天区面积