Quasars in the Galactic Anti-Center Area from LAMOST DR3

Zhi-Ying Huo, Xiao-Wei Liu, Jian-Rong Shi, Mao-Sheng Xiang, Yang Huang, Hai-Bo Yuan, Jian-Nan Zhang, Wei Zhang, Jian-Ling Wang, Yu-Zhong Wu, Zi-Huang Cao, Yong Zhang, Yue-Fei Wang, Yong-Hui Hou


Abstract We present a sample of quasars discovered in an area near the Galactic Anti-Center covering 150° ≤ l ≤ 210° and |b| ≤ 30°, based on LAMOST Data Release 3 (DR3). This sample contains 151 spectroscopically confirmed quasars. Among them 80 are newly discovered with LAMOST. All these quasars are very bright, with i magnitudes peaking around 17.5 mag. All the new quasars were discovered serendipitously from objects that were originally targeted with LAMOST as stars having bluer colors, except for a few candidates targeted as variable, young stellar objects. This bright quasar sample at low Galactic latitudes will help fill the gap in the spatial distribution of known quasars near the Galactic disk that are used to construct an astrometric reference frame for the purpose of accurate proper motion measurements that can be applied to, for example, Gaia. They are also excellent tracers to probe the kinematics and chemistry of the interstellar medium in the Milky Way disk and halo via absorption line spectroscopy.


Keywords Galaxy: disk — quasars: emission lines — reference systems — proper motions — ISM: kinematics and dynamics

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