Fig. 2.
Age distribution for Galactic open clusters in the solar vicinity. Top panel: normalised histograms and kernel-density estimates. The cyan and blue distributions show the results from the MWSC survey (Kharchenko et al. 2013; Piskunov et al. 2018, respectively); the red distribution shows our Gaia DR2-derived results. Middle and bottom panels: observational CAF determinations for the extended solar neighbourhood, from Wielen (1971) to our completeness-corrected Gaia DR2-based census (red). Error bars include Poissonian uncertainties in the number of clusters per bin and systematic uncertainties from the completeness correction (see Appendix A). Bottom panel: CAF comparison to models, as indicated in the legend.
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