Upper panel: Example of a cut in a different region of the BEL that is used to highlight the presence of a binary in the equal-mass case. Lower panel: qualitative example of the elements to be considered to highlight the presence of a binary in the case of an equal-mass binary with no spiral pattern. The red elements are the ones that are used in the method proposed for unequal-mass binaries, while the green ones are the ones that will encode the binary signature for the equal-mass binary.