2021
DOI: 10.48550/arxiv.2111.05291
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Structural parameters of 389 local Open Clusters

Y. Tarricq,
C. Soubiran,
L. Casamiquela
et al.

Abstract: Context. The distribution of member stars in the surroundings of an open cluster can shed light on the process of its formation, evolution and dissolution. The analysis of structural parameters of open clusters as a function of their age and position in the Galaxy brings constraints on theoretical models of cluster evolution. The Gaia catalogue is very appropriate to find members of open clusters at large distance from their centers. Aims. We aim at revisiting the membership lists of open clusters from the sol… Show more

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(15 citation statements)
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“…To define the members of each cluster, they chose to use 0.5 as a probability cutoff, which was considered the best compromise between contamination and recovery rates for the 389 clusters they analysed. However, UBC 274 is quite different from that sample of clusters, particularly because it is located further away than the analysed clusters in Tarricq et al (2021b), and this option is not well adapted in this case. We based our probability cutoff on the analysis of the performance of the algorithm on simulations of synthetic clusters.…”
Section: Membership Analysismentioning
confidence: 89%
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“…To define the members of each cluster, they chose to use 0.5 as a probability cutoff, which was considered the best compromise between contamination and recovery rates for the 389 clusters they analysed. However, UBC 274 is quite different from that sample of clusters, particularly because it is located further away than the analysed clusters in Tarricq et al (2021b), and this option is not well adapted in this case. We based our probability cutoff on the analysis of the performance of the algorithm on simulations of synthetic clusters.…”
Section: Membership Analysismentioning
confidence: 89%
“…As noticed in Tarricq et al (2021b), the distribution of the member's probability depends on multiple factors, including the heliocentric distance of the cluster and the relative density of the cluster with respect to the surrounding field in the proper motion and parallax space. To define the members of each cluster, they chose to use 0.5 as a probability cutoff, which was considered the best compromise between contamination and recovery rates for the 389 clusters they analysed.…”
Section: Membership Analysismentioning
confidence: 99%
See 3 more Smart Citations