4 papers
Photometric and Spectroscopic Studies of Four Low Mass-ratio Contact Binaries with Period Longer than 0.7 days
Yi-Fan Wang, Kai Li, Fei Liu +7
Photometric and spectroscopic studies of four long-period low mass-ratio contact binaries, V0508 And, V0844 Aur, V0699 Cep, and NSVS 6259046, are performed. V0508 And, V0844 Aur, a…
Photometric and Spectroscopic Studies of Two Early-Type Eclipsing Binaries
Peng-Fei Ye, Kai Li, Fei Liu +2
Using high-precision photometric data from TESS, medium resolution spectroscopic data from LAMOST, and long-term eclipse timings, we provide orbital parameters for two early-type d…
Extremely Low Mass Ratio Contact Binaries. II. The First Photometric and Spectroscopic Investigations of Six Systems with Orbital Periods Longer than 0.5 days
Fei Liu, Kai Li, Xiang Gao +7
The photometric and spectroscopic studies of six contact binaries were performed for the first time. The orbital periods of all the six targets are longer than 0.5d, and we discove…
Photometric and Spectroscopic Investigations of Three Large Amplitude Contact Binaries
Xin Xu, Kai Li, Fei Liu +8
We performed photometric and spectroscopic studies of three large amplitude contact binaries, NSVS 2418361, ATLAS J057.1170+31.2384 and NSVS 7377875. The amplitudes of three system…