1. The LAMOST Survey of Background Quasars in the Vicinity of the Andromeda and Triangulum Galaxies. II. Results from the Commissioning Observations and the Pilot Surveys
- Author
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Genrong Liu, Zhenchao Zhang, Yuan Tian, Jia-Ning Wang, Ming-Zhi Wei, Fang Zhou, Zhongwen Hu, Yong-Hui Hou, Huo-Ming Shi, Wei Zhang, Zhong-Rui Bai, Lei Wang, Ji-Jun Ni, Yanxia Zhang, Dan Wang, Haotong Zhang, Ya-Juan Lei, Qi-Shuai Lu, Yongheng Zhao, Gang Wang, Xin-Lin Zhou, Mao-Sheng Xiang, Zheng-Qiu Yao, Xin-Nan Li, Hong-Zhuan Hu, Aihua Li, Ye-Ping Li, Xiao-Yan Chen, Ming Zhao, Liang-Ping Tu, Yongtian Zhu, Yue-Fei Wang, Jian Li, Fengfei Wang, H.-L. Yuan, En-Peng Zhang, Yong-Jun Qi, Yan Li, Yaoquan Chu, Jian-Jun Chen, Jian-Rong Shi, Guang-Wei Li, Lin Yan, Yue Wu, Jia-Ru Chu, Xiangqun Cui, Yu Luo, Xiaowei Liu, Yong Zhang, Xiang-Xiang Xue, You Wang, Zhi-Ying Huo, Zheng-Hong Tang, Zhaoxiang Qi, Zhi-Gang Liu, Li Men, Yang Huang, Gang Zhao, Lei Jia, Haibo Yuan, Fang-Hua Jiang, Jian-Nan Zhang, Shi-Wei Sun, H. W. Zhang, Bing Du, A-Li Luo, Si-Cheng Zou, Chao Zhai, Yong Yu, Guoping Li, and Shu-Qing Wang
- Subjects
Physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Proper motion ,Triangulum ,Radio galaxy ,Astrophysics::High Energy Astrophysical Phenomena ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,Local Group ,Astronomy ,Astronomy and Astrophysics ,Quasar ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Schmidt camera ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,LAMOST ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Galaxy Astrophysics ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present new quasars discovered in the vicinity of the Andromeda and Triangulum galaxies with the LAMOST during the 2010 and 2011 observational seasons. Quasar candidates are selected based on the available SDSS, KPNO 4 m telescope, XSTPS optical, and WISE near infrared photometric data. We present 509 new quasars discovered in a stripe of ~135 sq. deg from M31 to M33 along the Giant Stellar Stream in the 2011 pilot survey datasets, and also 17 new quasars discovered in an area of ~100 sq. deg that covers the central region and the southeastern halo of M31 in the 2010 commissioning datasets. These 526 new quasars have i magnitudes ranging from 15.5 to 20.0, redshifts from 0.1 to 3.2. They represent a significant increase of the number of identified quasars in the vicinity of M31 and M33. There are now 26, 62 and 139 known quasars in this region of the sky with i magnitudes brighter than 17.0, 17.5 and 18.0 respectively, of which 5, 20 and 75 are newly-discovered. These bright quasars provide an invaluable collection with which to probe the kinematics and chemistry of the ISM/IGM in the Local Group of galaxies. A total of 93 quasars are now known with locations within 2.5 deg of M31, of which 73 are newly discovered. Tens of quasars are now known to be located behind the Giant Stellar Stream, and hundreds behind the extended halo and its associated substructures of M31. The much enlarged sample of known quasars in the vicinity of M31 and M33 can potentially be utilized to construct a perfect astrometric reference frame to measure the minute PMs of M31 and M33, along with the PMs of substructures associated with the Local Group of galaxies. Those PMs are some of the most fundamental properties of the Local Group., 26 pages, 6 figures, AJ accepted
- Published
- 2013