The solar neighbourhood is populated by nearby (1 M_⊙. Gaia We detected 4166 source candidate members of 44 known groups, including 2545 new candidates. We recovered 44-54% of the literature candidates and estimated a contamination rate from old field stars of 16-24%. The candidates of the detected groups distribute along young isochrones, which suggests that they are potential members of NYMGs. Parameterisations of both the average of the 33 IMFs based on our detections (mc=0. 25 M_⊙, σc=0. 45 and α=-2. 26 and the one based on the known candidates from the literature (mc=0. 22 M_⊙, σc=0. 45 and α=-2. 45 are in agreement with the IMF parameterisation of the solar neighbourhood and young stellar associations. Our parameterisation of the average IMF, together with the distribution of the detected group members along young isochrones offer strong evidence suggesting that the NYMGs are remnants of individual stellar associations and clusters. We confirm that there are no systematic biases in our detection and in the literature in the range of 0. 1<m/M_⊙<10.
Bertolotto-Stefanelli et al. (Mon,) studied this question.