Han Xianming L1; Zhang Liyun1; Shi Jianrong2; Pi Qingfeng3; Lu Hongpeng1; Zhao Libo1; Terheide Rachel K4; Jiang Linyang1
Source Publicationresearchinastronomyandastrophysics
AbstractBig data in the form of stellar spectra from the spectroscopic survey associated with the Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) are important for studying properties of cataclysmic variables (CVs). By cross matching the catalogs of CVs compiled with LAMOST DR3, acquired from October 2011 to July 2015, we obtained the first spectroscopic catalog for CVs observed by LAMOST with high signal to noise ratio, above 8. By integrating line profiles, their equivalent widths (EWs) of the H alpha, H beta, H gamma and H delta, as well as He I 5876 and 6678 angstrom lines, were calculated. There were 74 stellar spectra from 48 known CVs and three spectra from three new CV candidates. At the same time, we also collected their previously published EWs. Thirty-three objects had repeated spectra and 30 stars showed spectral variability in the Ha line. Moreover, we carried out photometric follow-up studies for five CVs (UU Aqr, TT Tri, PX And, BP Lyn and RW Tri). We obtained nine new light curves and revised their linear ephemerides. For RW Tri, there is a possible oscillation with an amplitude of 0.0031(2) days and a period of 47.6 +/- 0.4 years, which might be caused by a third body (brown dwarf) or magnetic activity cycle.
Funding Project[National Natural Science Foundation of China (NSFC)] ; [Chinese Academy of Sciences (CAS)] ; [National Development and Reform Commission] ; [CAS] ; [People's Government of Yunnan Province] ; [Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS] ; [Natural Science Foundation for Young Scientists from the Office of Education of Guizhou Province] ; [Butler University]
Document Type期刊论文
Recommended Citation
GB/T 7714
Han Xianming L,Zhang Liyun,Shi Jianrong,et al. cataclysmicvariablesbasedonthestellarspectralsurveylamostdr3[J]. researchinastronomyandastrophysics,2018,18(6).
APA Han Xianming L.,Zhang Liyun.,Shi Jianrong.,Pi Qingfeng.,Lu Hongpeng.,...&Jiang Linyang.(2018).cataclysmicvariablesbasedonthestellarspectralsurveylamostdr3.researchinastronomyandastrophysics,18(6).
MLA Han Xianming L,et al."cataclysmicvariablesbasedonthestellarspectralsurveylamostdr3".researchinastronomyandastrophysics 18.6(2018).
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