97 citations · 191 across the 7 of their papers we have counts for
7 papers
A brown dwarf orbiting around the planetary-nebula central binary KV Vel
S. -B. Qian, L. -Y. Zhu, F. -X. Li +9
KV Vel is a non-eclipsing short-period (P = 0.3571 days) close binary containing a very hot subdwarf primary (77000 K) and a cool low-mass secondary star (3400 K) that is located a…
DE CVn: an eclipsing post-common envelope binary with a circumbinary disk and a giant planet
Z. T Han, S. B. Qian, L. Y. Zhu +8
We present a timing analysis of the eclipsing post-common envelope binary (PCEB) DE CVn. Based on new CCD photometric observations and the published data, we found that the orbital…
Physical Properties and Evolutionary States of EA-type Eclipsing Binaries Observed by LAMOST
S. -B. Qian, J. Zhang, J. -J. He +5
About 3196 EA-type binaries (EAs) were observed by LAMOST by June 16, 2017 and their spectral types were derived. Meanwhile stellar atmospheric parameters of 2020 EAs were determin…
A New Stellar Outburst Associated with the Magnetic Activities of the K-type Dwarf in a White-dwarf Binary
S. -B. Qian, Z. -T. Han, B. Zhang +7
1SWASP\,J162117.36441254.2 was originally classified as an EW-type binary with a period of 0.20785\,days. However, it was detected to have undergone a stellar outburst on June 3…
LAMOST Views Scuti Pulsating Stars
S. B. Qian, L. J. Li, J. J. He +3
About 766 Scuti stars were observed by LAMOST by June 16, 2017. Stellar atmospheric parameters of 525 variables were determined, while spectral types were obtained for all samp…
WZ Sge: an eclipsing cataclysmic variable evolving towards the period minimum
Z. -T. Han, S. -B. Qian, Irina Voloshina +1
We present the photometric results of the eclipsing cataclysmic variable (CV) WZ Sge near the period minimum (). Eight new mid-eclipse times were determined and the orbita…
Cyclic period oscillation of the eclipsing dwarf nova DV UMa
Z. -T. Han, S. -B. Qian, Irina Voloshina +1
DV UMa is an eclipsing dwarf nova with an orbital period of h, which lies just at the bottom edge of the period gap. To detect its orbital period changes we present 12 n…