典型文献
Effects of Binaries on Open Cluster Age Determination in Bayesian Inference
文献摘要：
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, metallicity, distance modulus, color excess, binary fraction, and rotating star fraction, are derived from color–magnitude-diagrams (CMDs) via isochrone fitting to high-precision Gaia EDR3 data. Across the simple stellar population of binary and single-star, age differences can be found with the same star cluster. A Bayesian applied regression modeling software, Stan, is employed to explore how much binaries affect the age determination of open clusters. Our results present less statistically significant difference between the binary-star simple populations (bsSSPs) and the single-star simple populations (ssSSPs) for cluster age determination. For all clusters in our sample, the ages estimated using the bsSSPs models are younger than those estimated using the ssSSPs, with a mean value of ～70 Myr. However, it is found that for 52.5％clusters in our sample, ages are relatively sensitive to the presence of binaries, at least ～25％ younger. This suggests that in studies of open cluster age determinations, the effects of binary interactions on the whole sample are not prominent, but its effects on some clusters should still be included as an essential ingredient.
文献关键词：
中图分类号：
作者姓名：
Zhong-Mu Li;Su Zhang;Jing Chen;Wen-Chang Zhao;Wu You
作者机构：
Institute for Astronomy,Dali University,Dali 671003,China
文献出处：
引用格式：
[1]Zhong-Mu Li;Su Zhang;Jing Chen;Wen-Chang Zhao;Wu You-.Effects of Binaries on Open Cluster Age Determination in Bayesian Inference)[J].天文和天体物理学研究,2022(08):230-237
A类：
Binaries,binaries,CMDs,isochrone,EDR3,bsSSPs,ssSSPs
B类：
Effects,Open,Cluster,Age,Determination,Bayesian,Inference,We,investigate,effects,open,clusters,Galactic,disk,via,framework,Stellar,properties,these,star,including,metallicity,distance,modulus,color,excess,binary,fraction,rotating,derived,from,magnitude,diagrams,fitting,high,precision,Gaia,data,Across,simple,stellar,single,differences,found,same,applied,regression,modeling,software,Stan,employed,explore,how,much,affect,Our,results,present,less,statistically,significant,between,populations,For,our,sample,ages,estimated,using,models,younger,than,those,mean,value,Myr,However,that,relatively,sensitive,presence,least,This,suggests,studies,determinations,interactions,whole,not,prominent,but,its,some,should,still,included,essential,ingredient
AB值：
0.488066
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