Revisiting The Mass-Size Relation Of Structures In Molecular Clouds

Abstract We revisit the mass-size relation of molecular cloud structures based on column density map Cygnus-X complex. extract 135 peaks in and analyze distributions around these peaks. The averaged profiles, N(R) , all can be well fitted with broken power-laws, which are described by an inner power-law index n outer m radius R TP N at transition point. then explore M-R different samples varying parameters threshold, 0 determines boundary a structure. find that only when has wide range values, may largely probe distribution, is related to . On contrary, constant no direct connection distribution; this case, equal 2 (when ≥ narrow values), larger than or slightly less < ).