An analysis of the twenty-five most distant open clusters

PERREN, G.; PERA, M.S.; GIORGI, E.; NAVONE, H.D.; VÁZQUEZ, R.A.

Córdoba

Otro; 63° Reunión Anual de la Asociación Argentina de Astronomía; 2021

AAA

We present an analysis of the twenty-five open cluster with the largest catalogued distances to the Sun (~ 9 Kpc). The clusters are selected after cross-matching the four largest published catalogs to date; distance values in these catalogs show enormous differences between them. The data used to perform the analysis (astrometry and photometry) is taken from the latest release of the Gaia survey. All clusters are processed with two of our most recent codes: pyUPMASK (responsible for selecting the most probable members) and ASteCA (employed to estimate the structural properties as well as the fundamental parameters). We find that the distances for these twenty-five open clusters show differences of up to 3 Kpc, even for the catalogs that have the closest agreement with the values obtained after our detailed analysis.