103 citations · 237 across the 9 of their papers we have counts for
9 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…
Reconsidering The Bailey Diagrams of ab-type RR Lyrae Stars, Metallicity-Mediated Evolution as the Direct Cause of the Oosterhoff Phenomenon
L. -J. Li, S. -B. Qian, L. -Y. Zhu +2
We re-examine the Bailey diagrams of fundamental mode RR Lyrae stars from the perspective of horizontal branch (HB) evolution, identifying evolutionary effects as the probable dire…
Two Different Weak Modulations in ab-type RR Lyrae Variable V838 Cyg, and Potential Influence of Metal Abundance on Blazhko Modulation
L. -J. Li, S. -B. Qian, X. -D. Shi +1
Noting the weakest modulation and relatively high metal abundance of the ab-type RR Lyrae star V838 Cyg, we collected the photometric data of this star from several sky surveys to…
Reanalysis of c-type RR Lyrae Variable BE Dor, Period Modulations and Possible Mechanism
L. -J. Li, S. -B. Qian, L. -Y. Zhu
We reanalyzed the c-type RR Lyrae star BE Dor (MACHO 5.4644.8, OGLE-LMC-RRLYR-06002) that had been discovered to show cyclic period changes. The photometric data of several sky sur…
Carbon-Chain Molecules in Molecular Outflows and Lupus I Region--New Producing Region and New Forming Mechanism
Yuefang Wu, Xunchuan Liu, Xi Chen +18
Using the new equipment of the Shanghai Tian Ma Radio Telescope, we have searched for carbon-chain molecules (CCMs) towards five outflow sources and six Lupus I starless dust cores…
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…
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…
A Circumbinary Planet in Orbit Around the Short-Period White-Dwarf Eclipsing Binary RR Cae
S. -B. Qian, L. Liu, L. -Y. Zhu +3
By using six new determined mid-eclipse times together with those collected from the literature, we found that the Observed-Calculated (O-C) curve of RR Cae shows a cyclic change w…
Circumbinary Planets Orbiting the Rapidly Pulsating Subdwarf B-type binary NY Vir
S. -B. Qian, L. -Y. Zhu, Z. -B. Dai +3
We report here the tentative discovery of a Jovian planet in orbit around the rapidly pulsating subdwarf B-type (sdB-type) eclipsing binary NY Vir. By using new determined eclipse…