Unveiling the Initial Conditions of Open Star Cluster Formation

作     者：C.J.Hao Y.Xu L.G.Hou Z.H.Lin Y.J.Li C.J.Hao;Y.Xu;L.G.Hou;Z.H.Lin;Y.J.Li

作者机构：Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China School of Astronomy and Space ScienceUniversity of Science and Technology of ChinaHefei 230026China National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究(英文版))

年 卷 期：2023年第23卷第7期

页      面：288-299页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：funded by the National Natural Science Foundation of China(NSFC)Grant No.11933011 the Key Laboratory for Radio Astronomy support from the Natural Science Foundation of Jiangsu Province(grant number BK20210999) the Entrepreneurship and Innovation Program of Jiangsu Province NSFC grant No.12203104 

主　　题：Galaxy:stellar content (Galaxy:)open clusters and associations:general stars:formation stars:kinematics and dynamics 

摘      要：Open clusters(OCs)are infrequent survivors of embedded clusters gestated in molecular *** to now,little is known about the initial conditions for the formation of ***,we studied this issue using high-precision astrometric parameters provided by Gaia data release *** statistics show that the peculiar motion velocities of OCs vary slightly from infancy to old age,providing a remarkable opportunity to use OCs to trace their *** a dynamical method,we derived the masses of the progenitor clumps where OCs were born,which have statistical characteristics comparable to previously known results for clumps observed in the ***,the masses of the progenitor clumps of OCs indicate they should be capable of gestating massive O-type *** fact,after inspecting the observed OCs and O-type stars,we found that there are many O-type stars in *** destructive stellar feedback from O-type stars may disintegrate the vast majority of embedded clusters,and only those sufficiently dense ones can survive as OCs.