Spectral Identification of the u-band Variable Sources in Two LAMOST fields
Abstract
We selected 82 u-band variable objects based on the u-band photometry data from SCUSS and SDSS, in the field of LAMOST Complete Spectroscopic Survey of Pointing Area at Southern Galactic Cap. The magnitude variation of the targets is restricted to larger than 0.2 mag and limiting magnitude down to 19.0 mag in u-band. According to the spectra from LAMOST, there are 11 quasars with red-shift between 0.4 and 1.8, 60 variable stars and 11 unidentified targets. The variable stars include one active M-dwarf with a series of Balmer emission lines, seven Horizontal Branch stars containing six RR Lyrae stars matching with SIMBAD, and one giant, one AGB star and two RR Lyrae candidates by different colour selections. All these variable stars mainly locate near the main sequence in the g-r verse u-g diagram. The quasars are well distinguished from stars by both u-g colour and variation in u-band.
Cite
@article{arxiv.1608.00568,
title = {Spectral Identification of the u-band Variable Sources in Two LAMOST fields},
author = {TianWen Cao and Ming Yang and Hong Wu and TianMeng Zhang and JianRong Shi and HaoTong Zhang and Fan Yang and JingKun Zhao and Xu Zhou and Zhou Fan and ZhaoJi Jiang and Jun Ma and JiaLi Wang and ZhenYu Wu and Hu Zou and ZhiMin Zhou and JunDan Nie and A-Li Luo and XueBing Wu and YongHeng Zhao},
journal= {arXiv preprint arXiv:1608.00568},
year = {2017}
}
Comments
8 figures, 2 tables, accepted for publication in APSS