The dispersal law of young star clusters: free expansion -- A Gaia/eROSITA census of Orion and Sco--Cen

We measure how young star clusters disperse over time in the two nearest star-forming complexes.

We measure how young star clusters disperse over time in the two nearest star-forming complexes. Our sample comprises 44 \texttt{SigMA}-\textit{Gaia}-defined clusters in Orion and 31 in Sco--Cen, with isochronal ages of 2--25\,Myr. We extend each cluster's census with…