Improving the open cluster census

Context. Data from the Gaia satellite are revolutionising our understanding of the Milky Way. With every new data release, there is a need to update the census of open clusters. Aims. We aim to conduct a blind, all-sky search for open clusters using 729 million sources from Gaia DR3 down to magnitude G ∼ 20, creating a homogeneous catalogue of clusters including many new objects. Methods. We used the Hierarchical Density-Based Spatial Clustering of Applications with Noise (HDBSCAN) algorithm to recover clusters. We validated our clusters using a statistical density test and a Bayesian convolutional neural network for colour-magnitude diagram classification. We inferred basic astrometric parameters, ages,…

• NA
  National Aeronautics and Space Administration
• ES
  European Space Agency
• DF
  Deutsche Forschungsgemeinschaft

  Awards: 138713538, SFB 881