6 papers
First double red giant Algol system with active mass transfer
Mikhail Kovalev, Hailiang Chen, Sufen Guo +7
Double red giant stars are very important for studies of the stability of mass transfer, common-envelope evolution, and the formation of double white dwarfs with short orbital peri…
Astrometric properties of reference frame sources as a function of redshift
Zhiyun Zhang, N. Liu, Xiaxuan Zhang +8
Previous studies based on the latest realisation of the International Celestial Reference Frame (ICRF3) have suggested a correlation between astrometric properties (such as the rad…
The new compact triple system: discovery of bright third star around contact binary using LAMOST-MRS spectra and photometry
Mikhail Kovalev, Azizbek Matekov, Sufen Guo +2
We present a study of the third star orbiting around known contact eclipsing binary J04+25 using spectra from the LAMOST medium-resolution survey (MRS) and publicly available photo…
Orbital Parameters of 665 Double-lined Spectroscopic Binaries in the LAMOST Medium-Resolution Survey
Sufen Guo, Mikhail Kovalev, Jiao Li +9
The period, mass ratio, eccentricity, and other orbital parameters are fundamental for investigating binary star evolution. However, the number of binaries with known orbital param…
Identifying Hierarchically Triple Star Systems with Gaia DR3 and LAMOST
Tongyu He, Jiao Li, Jiangdan Li +8
Triple star systems are critical for understanding stellar dynamics and compact objects in astrophysics, yet confirmed hierarchical triples identified via spectroscopy remain limit…
When LAMOST meets Gaia DR3 Exploring the metallicity of open clusters
R. Zhang, Guo-Jian Wang, Yuxi +9
Context. Open clusters (OCs) are valuable probes of stellar population characteristics. Their age and metallicity provide insights into the chemical enrichment history of the Milky…