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The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars
Li Wang, Licai Deng, Xiaoying Pang +4
The presence of young stellar populations in the Large Magellanic Cloud cluster NGC 1783 has caught significant attention, with suggestions ranging from it being a genuine secondar…
Double-mode RR Lyrae star -- robust distance and metallicity indicators
Shu Wang, Xiaodian Chen, Jianxing Zhang +1
RR Lyrae (RR Lyr) stars are a well-known and useful distance indicator for old stellar populations such as globular clusters and dwarf galaxies. Fundamental-mode RR Lyr (RRab) star…
The use of double-mode RR Lyrae stars as robust distance and metallicity indicators
Xiaodian Chen, Jianxing Zhang, Shu Wang +1
RR Lyrae stars are one of the primary distance indicators for old stellar populations such as globular clusters, dwarf galaxies and galaxies. Typically, fundamental-mode RR Lyr sta…
Physical Properties of 29 sdB+dM Eclipsing Binaries in Zwicky Transient Facility
Min Dai, Xiaodian Chen, Kun Wang +3
The development of large-scale time-domain surveys provides an opportunity to study the physical properties as well as the evolutionary scenario of B-type subdwarfs (sdB) and M-typ…
Further evidence of shocks in the first-overtone RR Lyrae pulsators: first detection of shock-triggered magnesium emissions
Xiao-Wei Duan, Weijia Sun, Xiaodian Chen +2
The behavior of the shock wave in the atmosphere of the non-fundamental mode RR Lyrae pulsator remains a mystery. In this work, we firstly report a blueshifted Mg triplet emission…
Exploring the stellar rotation of early-type stars in the LAMOST Medium-Resolution Survey. II. Statistics
Weijia Sun, Xiao-Wei Duan, Licai Deng +1
Angular momentum is a key property regulating star formation and evolution. However, the physics driving the distribution of the stellar rotation rates of early-type main-sequence…