Context :

Aims : To derive the mass profiles of the different luminous and dark components in clusters .

Methods : The cluster mass profile is determined by using the Jeans equation applied to the projected phase-space distribution of about 3000 galaxies members of 59 nearby clusters from the ESO Nearby Abell Cluster Survey .
The baryonic and subhaloes mass components are determined from the galaxies ’ luminosity-density profiles through scaling relations between luminosities and baryonic and dark halo masses .
The baryonic mass component associated with the intra-cluster gas is determined using X-ray data from ROSAT .

Results : The baryon-to-total mass fraction decreases from a value of \simeq 0.12 near the center to \simeq 0.08 at the distance of \simeq 0.15 virial radii , then it increases again , to reach a value of \simeq 0.14 at the virial radius .
Diffuse , cluster-scale dark matter dominates at all radii , but its contribution to the total mass content decreases outwards to the virial radius , where the dark matter in subhaloes may contribute up to \simeq 23 % , and the baryons \simeq 14 % of the total mass .
The dark mass and diffuse dark mass profiles are well fit by both cuspy and cored models .
The subhalo mass distribution is not fit by either model .

Conclusions :