Mass accretion rate as a function of stellar mass. Filled circles and diamonds are significantly accreting primaries and secondaries of Cha I binaries. Open symbols are upper limits of undetected binary components. Colored symbols denote the restricted sample, gray symbols the full sample only. Green filled triangles show Cha I single stars also measured from Brγby Antoniucci et al. (2011). These authors also derived a power-law fit to their data, included as a green dashed line. Upper-limit values of the Antoniucci et al. non-detections are not published.