19 citations · 72 across the 8 of their papers we have counts for
8 papers
Exploration of morphological coherence in open clusters with a "core-shell'' structure
Qingshun Hu, Yu Zhang, Songmei Qin +3
The study of their morphological coherence allows us to obtain a better understanding of the morphological evolution of open clusters. We employed the ellipsoid fitting method to d…
Cluster aggregates surrounding Pismis 5 in the Vela Molecular Ridge
Ming Feng Qin, Yu Zhang, Jinzhong Liu +5
Context. In the Gaia era, the precision of astrometric data is unprecedented. High-quality data make it easier to find more cluster aggregates and support further confirmation of t…
A detection of the layered structure of nearby open clusters
Qingshun Hu, Yu Zhang, Ali Esamdin +2
We applied the newly developed rose diagram overlay method to detect the layered structure of 88 nearby open clusters (500~pc) on the three projections after the distance cor…
A Low-speed Intruder Star in Hyades: A Temporary Residence
Qingshun Hu, Yu Zhang, Ali Esamdin +4
We hereby report a low-speed (about~21~km~s with respect to the Sun) intruder member in the Hyades cluster based on the data in the literature. The results show that…
A photometric study of two contact binaries: CRTS J025408.1+265957 and CRTS J012111.1+272933
S. Ma, J. Z. Liu, Y. Zhang +2
We performed new photometric observations for two contact binaries (i.e., CRTS J025408.1+265957 and CRTS J012111.1+272933), which were observed by the 1.0-m telescope at Xingjiang…
Searching for Variable Stars in the Open Cluster NGC 2355 and Its Surrounding Region
Hong Wang, Yu Zhang, Xiangyun Zeng +4
We have investigated the variable stars in the field surrounding NGC 2355 based on the time-series photometric observation data. More than 3000 CCD frames were obtained in the V ba…
Decoding the Morphological Evolution of Open Clusters
Qingshun Hu, Yu Zhang, Ali Esamdin
Base on Gaia Second Data Release and the combination of nonparametric bivariate density estimation with the least square ellipse fitting, we derive the shape parameters of the samp…
Deciphering Star Cluster Evolution by Shape Morphology
Qingshun Hu, Yu Zhang, Ali Esamdin +2
We analyze the morphological evolution of open clusters and provide shape parameters for 265 open clusters. The results show that the overall shape of sample clusters becomes more…