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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…
A Superluminous Supernova Lightened by Collisions with Pulsational Pair-instability Shells
Weili Lin, Xiaofeng Wang, Lin Yan +23
Superluminous supernovae are among the most energetic stellar explosions in the Universe, but their energy sources remain an open question. Here we present long-term observations o…