5 papers
Systematic search for blue hyper-velocity stars from LAMOST survey
Yongkang Sun, Yang Huang, Jifeng Liu +6
Hypervelocity stars (HVSs) represent a unique class of objects capable of escaping the gravitational pull of the Milky Way due to extreme acceleration events, such as close encount…
Compositions of the Hercules-Aquila Cloud and Virgo Over-density
Dashuang Ye, Cuihua Du, Mingji Deng +4
Based on a sample of K giant from Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST) Data Release 8 and a sample of RR Lyrae (RRL) from \textit{Gaia} Data Release 3…
A high-velocity star recently ejected by an intermediate-mass black hole in M15
Yang Huang, Qingzheng Li, Jifeng Liu +4
The existence of intermediate-mass black holes (IMBHs) is crucial for understanding various astrophysical phenomena, yet their existence remains elusive, except for the LIGO-Virgo…
Discovery of a new IW And-type dwarf nova with both tilted disk and tidal instability
Yongkang Sun, Xin Li, Qige Ao +6
IW And-type dwarf novae are anomalous Z Cam stars featured with outbursts happening during standstill states, which are not expected in the standard disk instability model. The phy…
The origin of High-velocity stars considering the impact of the Large Magellanic Cloud
Jiwei Liao, Cuihua Du, Mingji Deng +5
Utilizing astrometric parameters sourced from \textit{Gaia} Data Release 3 and radial velocities obtained from various spectroscopic surveys, we identify 519 high-velocity stars (H…