| Title | The LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern Galactic Cap. I. The Spectroscopic Redshift Catalog |
| Authors | Yang, Ming Wu, Hong Yang, Fan Lam, Man I. Cao, Tian-Wen Wu, Chao-Jian Zhao, Pin-Song Zhang, Tian-Meng Zhou, Zhi-Min Wu, Xue-Bing Zhang, Yan-Xia Shao, Zheng-Yi Jing, Yi-Peng Shen, Shi-Yin Zhu, Yi-Nan Du, Wei Lei, Feng-Jie He, Min Jin, Jun-Jie Shi, Jian-Rong Zhang, Wei Wang, Jian-Ling Wu, Yu-Zhong Zhang, Hao-Tong Luo, A-Li Yuan, Hai-Long Bai, Zhong-Rui Kong, Xu Gu, Qiu-Sheng Zhou, Xu Ma, Jun Hu, Zou Nie, Jun-Dan Wang, Jia-Li Zhang, Yong Hou, Yong-Hui Zhao, Yong-Heng |
| Affiliation | Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Datun Rd 20A, Beijing 100012, Peoples R China. Natl Observ Athens, IAASARS, Vas Pavlou & I Metaxa, Penteli 15236, Greece. Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China. Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China. Shanghai Jiao Tong Univ, Sch Phys & Astron, 800 Dongchuan Rd, Shanghai 200240, Peoples R China. Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China. Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China. Chinese Acad Sci, Natl Astron Observ, Nanjing Inst Astron Opt & Technol, Nanjing 210042, Jiangsu, Peoples R China. Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China. Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China. Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Datun Rd 20A, Beijing 100012, Peoples R China. Yang, M (reprint author), Natl Observ Athens, IAASARS, Vas Pavlou & I Metaxa, Penteli 15236, Greece. Yang, M (reprint author), Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China. |
| Keywords | catalogs galaxies: distances and redshifts galaxies: general galaxies: statistics surveys STAR-FORMING GALAXIES MASS ASSEMBLY GAMA DIGITAL SKY SURVEY DATA RELEASE ENVIRONMENTAL DEPENDENCE VELOCITY DISPERSIONS INFRARED GALAXIES FORMATION RATES FIELD GALAXIES RICH CLUSTERS |
| Issue Date | 2018 |
| Publisher | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES |
| Citation | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES. 2018, 234(1). |
| Abstract | We present a spectroscopic redshift catalog from the LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern Galactic Cap (SGC), which is designed to observe all sources (Galactic and extragalactic) by using repeating observations with a limiting magnitude of r = 18.1 mag in two 20 deg(2) fields. The project is mainly focusing on the completeness of LAMOST ExtraGAlactic Surveys (LEGAS) in the SGC, the deficiencies of source selection methods, and the basic performance parameters of the LAMOST telescope. In both fields, more than 95% of galaxies have been observed. A post-processing has been applied to the LAMOST 1D spectrum to remove the majority of remaining sky background residuals. More than 10,000 spectra have been visually inspected to measure the redshift by using combinations of different emission/absorption features with an uncertainty of sigma(z) (1+ z)< 0.001. In total, 1528 redshifts (623 absorption and 905 emission line galaxies) in Field A and 1570 redshifts (569 absorption and 1001 emission line galaxies) in Field B have been measured. The results show that it is possible to derive redshift from low S/N galaxies with our post-processing and visual inspection. Our analysis also indicates that up to one-fourth of the input targets for a typical extragalactic spectroscopic survey might be unreliable. The multi-wavelength data analysis shows that the majority of midinfrared- detected absorption (91.3%) and emission line galaxies (93.3%) can be well separated by an empirical criterion of W2 - W3 = 2.4. Meanwhile, a fainter sequence paralleled to the main population of galaxies has been witnessed both in M-r/W2 -W3 and M-*/W2 -W3 diagrams, which could be the population of luminous dwarf galaxies but contaminated by the edge-on/highly inclined galaxies (similar to 30%). |
| URI | http://hdl.handle.net/20.500.11897/500085 |
| ISSN | 0067-0049 |
| DOI | 10.3847/1538-4365/aa921e |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
