Revisiting the open clusters in the Cygnus OB2 region in light of Gaia EDR3

LEONARDO G. PAIZ; M. SILVINA DE BIASI; ROSA B. ORELLANA

Ciudad Autónoma de Buenos Aires

Congreso; 64º Reunión Anual de la Asociación Argentina de Astronomía; 2022

In this work, we revisit the Cygnus OB2 region to detect the open clusters taking profit of the high accuracy of Gaia EDR3 data up to magnitude G = 19.5mag. This region shows various substructures atdifferent distances: three stellar associations and several open clusters. By analysing both proper motion and spatial over-densities, 11 open clusters have been identified, from which three are new. The determination of the cluster parameters and the identification of members were obtained by applying a parametric model to the positions and proper motions. Positions and parallaxes of the members lead to calculate the coordinates of the centre of the clusters and to estimate their distances.