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Extended Main-sequence Turnoff as a Common Feature of Milky Way Open Clusters

Cordoni, G.; Milone, Antonino P.; Marino, Anna Fabiola; Di Criscienzo, M.; D’Antona, F.; Dotter, Aaron; Lagioia, E. P.; Tailo, Marco


We present photometric analysis of 12 Galactic open clusters and show that the same multiple-population phenomenon observed in Magellanic Clouds (MCs) is present in nearby open clusters. Nearly all the clusters younger than ∼2.5 Gyr of both MCs exhibit extended main-sequence turnoffs (eMSTOs) and all the cluster younger than ∼700 Myr show broadened/split main sequences (MSs). High-resolution spectroscopy has revealed that these clusters host stars with a large spread in the observed projected...[Show more]

CollectionsANU Research Publications
Date published: 2018-12-19
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/aaedc1
Access Rights: Open Access


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