111 citations · 657 across the 22 of their papers we have counts for
22 papers
The study of eleven contact binaries with mass ratios less than 0.1
Xin-Yi Liu, Kai Li, Raul Michel +6
Multi-band photometric observations of eleven totally eclipsing contact binaries were carried out. Applying the Wilson-Devinney program, photometric solutions were obtained. There…
Photometric and spectroscopic studies of the long period low mass ratio deep contact binary KN Per
Xin-Yi Gao, Kai Li, Ya-Wen Cai +6
The photometric analysis and spectroscopic study of the long period low mass ratio deep contact binary KN Per were executed. The light curves of BV(RI)-band were from the Ningb…
The First Photometric and Orbital Period Investigation of an Extremely Low Mass Ratio Contact Binary with a Sudden Period Change, TYC 4002-2628-1
Di-Fu. Guo, Kai Li, 1 Fen Liu +6
Photometric observations for the totally eclipsing binary system TYC 4002-2628-1, were obtained between November 2020 and November 2021. To determine the stellar atmospheric parame…
Extremely low mass ratio contact binaries -- I. the first photometric and spectroscopic investigations of ten systems
Kai Li, Xiang Gao, Xin-Yi Liu +4
The photometric and spectroscopic investigations of ten contact binaries were presented for the first time. It is discovered that the mass ratios of all the ten targets are smaller…
Two contact binaries with mass ratios close to the minimum mass ratio
Kai Li, Qi-Qi Xia, Chun-Hwey Kim +5
The cut-off mass ratio is under debate for contact binaries. In this paper, we present the investigation of two contact binaries with mass ratios close to the low mass ratio limit.…
Spectroscopic evidence for a large spot on the dimming Betelgeuse
Sofya Alexeeva, Gang Zhao, Dong-Yang Gao +4
During October 2019 and March 2020, the luminous red supergiant Betelgeuse demonstrated an unusually deep minimum of its brightness. It became fainter by more than one magnitude an…