Proper motion vs. distance plot for the known YSO candidates and the newly identified co-moving sources. The filled triangles and circles in red represent the d − μ_α⋆ and d − μ_δ values, respectively, of the known YSO candidates in L1147/1158, L1172/1174, and L1177. The open blue triangles and circles are the d − μ_α⋆ and d − μ_δ values of the co-moving sources, respectively. The locations of HD 200775, BD+68°1118, and PV Cep are identified by square boxes. The gray ellipses represent the boundaries of the proper motion values and the distance ranges used to identify the new co-moving sources. The dashed lines show the median values of d, μ_α⋆, and μ_δ.