Characterizing NGC 6383: A study of pre-main sequence stars, mass segregation, and age using Gaia DR3 and 2MASS

L. M. Pulgar-Escobar, N. A. Henríquez-Salgado, Pierluigi Cerulo, R. E. Mennickent

Published 2024-05-15Version 1

This study employs Bayesian analysis and machine learning techniques to analyze the young open cluster NGC 6383 using data from Gaia DR3 and 2MASS. We identified 254 probable cluster members through HDBSCAN based on proper motions and determined the cluster's core and tidal radius. To perform this analysis, we utilized an extension of Hamiltonian Monte Carlo, the No-U-Turn Sampler, using the Bayesian library PyMC. Our results indicate a mean cluster age of $4 \pm 1$ Myr and a distance of $1.107 \pm 0.035$ kpc. The analysis reveals mass segregation, especially among binary stars, and suggests that NGC 6383 is not fully relaxed. We observed a well-defined main sequence and a population of pre-main sequence stars, with a star formation range from $\sim 1$ to $6$ Myr, indicating recent star formation activity.