P, υ sin i, L_X/L_J, NUV – J, pEW(Hα), and M_G as a function of G – J colour, shown from left to right and top to bottom. Bona fide sources younger than 50 Ma, of ~150 Ma, and between 300 Ma and 800 Ma are represented with light blue solid squares (■), dark blue solid up triangles (▲), and purple solid circles (●), respectively. Black open circles (∘) and pluses (+) stand for Praesepe and Hyades cluster members, respectively, while grey dots (•) represent the 1581 Carmencita M dwarfs without known close companions at ρ < 5 arcmin. The red dashed lines indicate the selection criteria from Eqs. (7)–(11).