5 papers
Missing pairs in open cluster catalogs
Qingshun Hu, Yufei Cai, Caroline Soubiran +4
Open clusters (OCs) in our Galaxy can be found in pairs, possibly forming physical binaries, or in groups. These objects offer unique insights into the process of star formation an…
The morphological stability of open clusters: a new 2D perspective
Yuting Li, Qingshun Hu, Yufei Cai +3
Open clusters (OCs) usually evolve gradually as the number of their members changes, which can be manifested in their morphological characteristics. We aim to investigate the morph…
Metallicities of old open clusters: A new Galactic map
Qingshun Hu, Caroline Soubiran
Old open clusters (OCs) can constrain the chemical evolution of the Galactic disc through their metallicity gradients and age-metallicity relation but they are affected by low stat…
An In-depth Investigation of the Primordial Cluster Pair ASCC 19 and ASCC 21
Qingshun Hu, Yuting Li, Mingfeng Qin +4
Utilizing \texttt{Gaia} data from the literature, we report a new young (8.9~Myr) cluster pair, ASCC~19 and ASCC~21, located near the Orion star-forming complex. The clusters…
3D projection analysis: characterizing the morphological stability of nearby open clusters
Qingshun Hu, Songmei Qin, Yangping Luo +1
Context. The study of open cluster morphology is pivotal for exploring their formation and evolutionary processes. Aims. We manage to assess the morphological stability of 105 near…