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Isochrone Fitting of Galactic Globular Clusters—Ⅵ.High-latitude Clusters NGC 5024 (M53),NGC 5053,NGC 5272 (M3),NGC 5466,and NGC7099 (M30): 《Research in Astronomy and Astrophysics》2024年第6期170-190,共21页G.A.Gontcharov S.S.Savchenko A.A.Marchuk C.J.Bonatto O.S.Ryutina M.Yu.Khovritchev V.B.Il'in A.V.Mosenkov D.M.Poliakov A.A.Smirnov; financial support from the Russian Science Foundation (grant No.20-72-10052)。; We fit various color–magnitude diagrams(CMDs) of the high-latitude Galactic globular clusters NGC 5024(M53),NGC 5053,NGC 5272(M3),NGC 5466,and NGC 7099(M30) by isochrones from the Dartmouth Stellar Evolution Database...; 关键词：(stars:)Hertzsprung Russell and C-M diagrams (ISM:)dust extinction (Galaxy:)globular clusters:general (Galaxy:)globular clusters:individual(NGC 5024 NGC 5053 NGC 5272 NGC 5466 NGC7099)

Study of 26 Galactic Open Clusters with Extended Main-sequence Turnoffs: 《Research in Astronomy and Astrophysics》2024年第6期28-37,共10页Yang-Yang Deng Zhong-Mu Li; supported by Yunnan Academician Workstation of Wang Jingxiu(202005AF150025);China Manned Space Project(NO.CMSCSST-2021-A08);Guanghe project(ghfund202302019167);the Natural Science Foundation of Yunnan Province(No.202201BC070003)。; Recent studies indicate that some Galactic open clusters(OCs)exhibit extended main-sequence turnoff(eMSTO)in their color–magnitude diagrams(CMDs).However,the number of Galactic OCs with eMSTO structures detected so f...; 关键词：(stars:)binaries:general Galaxy:fundamental parameters (Galaxy:)open clusters and associations:general (stars:)Hertzsprung Russell and C-M-diagrams

The Study of Helium Variations in Star Clusters Using China Space Station Telescope: 《Research in Astronomy and Astrophysics》2023年第7期110-117,共8页Xin Ji Licai Deng Yang Chen Chengyuan Li Chao Liu; supported in part by China Manned Space Project with NO.CMS-CSST-2021-A08;the National Natural Science Foundation of China(NSFC,Grants Nos.12233009,12233013,12073090 and 12003001)。; The China Space Station Telescope(CSST)is a 2 m space-based optical-UV telescope.Its primary goal is to carry out a high-resolution photometric imaging survey of a 17,500 square degree sky area using the on board Surv...; 关键词：(Galaxy:)globular clusters:general stars:abundances (stars:)Hertzsprung-Russell and C-M diagrams

Effects of Binaries on Open Cluster Age Determination in Bayesian Inference: 《Research in Astronomy and Astrophysics》2022年第8期230-237,共8页Zhong-Mu Li Su Zhang Jing Chen Wen-Chang Zhao Wu You; the National Natural Science Foundation of China(No.11863002);Yunnan Academician Workstation of Wang Jingxiu(No.202005AF150025);Sino-German Cooperation Project(No.GZ 1284);Research Fund Project of Yunnan Education Department(Nos.2020J0545 and 2021J0335)。; We investigate the effects of binaries on the cluster age determination for 561 open clusters in the Galactic disk via the Bayesian statistical framework.Stellar properties of these star clusters,including age,metalli...; 关键词：(stars:)Hertzsprung-Russell and CM diagrams (Galaxy:)open clusters and associations methods:statistical

Evaluating Helium Variations By Modeling Red Giant Branch Bump of Large Magellanic Cluster NGC 1978: 《Research in Astronomy and Astrophysics》2022年第3期72-79,共8页Xin Ji Cheng-Yuan Li Li-Cai Deng; support through Grant Nos.11633005 and 12073090;the National Key R&D Program of China(Grant No.2020YFC2201400)。; Many evidences show that the Multiple Population(MP)features exist not only in old clusters but also in intermediate-age clusters in the Megallanic Clouds(MCs),which are characterized by star-to-star abundance scatter...; 关键词：globular clusters:general globular clusters:individual(NGC 1978) stars:abundances stars:Hertzsprung-Russell and C-M diagrams stars:luminosity function

New open clusters found by manual mining of data based on Gaia DR2: 《Research in Astronomy and Astrophysics》2021年第5期147-154,共8页Juan Casado; Funding for the DPAC has been provided by national institutions,in particular the institutions participating in the Gaia Multilateral Agreement.This research has made use of the VizieR catalogue access tool,CDS,Strasbourg,France(DOI:10.26093/cds/vizier).; The physical nature of a series of 20 new open clusters is confirmed employing existing data on putative star members,mainly from the second Gaia Data Release(DR2).The clusters were discovered as overdensities of star...; 关键词：astronomical databases:miscellaneous parallaxes proper motions(stars:)Hertzsprung-Russell CCM diagrams(Galaxy:)open clusters associations:individual

Powerful CMD:a tool for color-magnitude diagram studies: 《Research in Astronomy and Astrophysics》2017年第7期77-88,共12页Zhong-Mu Li Cai-Yan Mao Qi-Ping Luo Zhou Fan Wen-Chang Zhao Li Chen Ru-Xi Li Jian-Po Guo; supported by the National Natural Science Foundation of China (Grant Nos. 11563002 and 11373003);the Joint Research Project of Sino-German Center (GZ1284);the National Key Basic Research Program of China (973 Program No. 2015CB857002);Yunnan Science Foundation (project name "Study of Binary Fraction of Star Clusters"); We present a new tool for color-magnitude diagram（CMD） studies, Powerful CMD. This tool is built based on the advanced stellar population synthesis（ASPS） model, in which single stars, binary stars, rotating stars ...; 关键词：（stars：） Hertzsprung-Russell and C-M diagrams - （Galaxy：） globular clusters general -galaxies clusters GENERAL

An application of the k-th nearest neighbor method to open cluster membership determination: 《Research in Astronomy and Astrophysics》2016年第12期46-50,共5页Xin-Hua Gao; supported by the National Natural Science Foundation of China (NSFC, Grant No. 11403004); We introduce a non-parametric method for open cluster membership determination in threedimensional（3D） velocity space（proper motion and radial velocity）. Clean 3D cluster members can be obtained by statistically a...; 关键词：open clusters and associations： individual （M67）-- Hertzsprung-Russell and C-M diagrams--stars： kinematics and dynamics

3D cluster members and near-infrared distance of open cluster NGC 6819: 《Research in Astronomy and Astrophysics》2015年第12期2193-2203,共11页Xin-Hua Gao Shou-Kun Xu Li Chen; supported by the National Natural Science Foundation of China(NSFC;Grant No.11403004);the School Foundation of Changzhou University(ZMF1002121);support by the 973 Program(2014 CB845702);the Strategic Priority Research Program"The Emergence of Cosmological Structures"of the Chinese Academy of Sciences(CAS;grant XDB09010100);the NSFC(Grant No.11373054); In order to obtain clean members of the open cluster NGC 6819, the proper motions and radial velocities of 1691 stars are used to construct a three-dimensional （3D） velocity space. Based on the DBSCAN clustering alg...; 关键词：open clusters and associations： individual （NGC 6819） -- Hertzsprung-Russell and C-M diagrams -- stars： kinematics and dynamics -- stars： distances

Discovery of high-velocity EHB stars in the globular cluster ωCentauri(NGC 5139): 《Research in Astronomy and Astrophysics》2015年第10期1639-1646,共8页Xin-Hua Gao Shou-Kun Xu Li Chen; supported by the National Natural Science Foundation of China(NSFC,Grant No.11403004);the School Foundation of Changzhou University(ZMF1002121);support by the 973 Program(2014CB845702);the Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(CAS;grant XDB09010100);by the NSFC(No.11373054); Abstract We report the discovery of 45 high-velocity extreme horizontal branch （EHB） stars in the globular cluster Omega Centauri （NGC 5139）. The tangential ve- locities of these EHB stars are determined to be in ...; 关键词：Galaxy： globular clusters： individual： ω Cen （NGC 5139） -- stars：Hertzsprung-Russell and C-M diagrams -- stars： kinematics and dynamics -- stars：binaries （including multiple）： close

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