Fig. 1
Calibration of the dynamical mass estimator for the AMAZE, LSD and SINS objects. Left panel: calibration of the “classical” virial product μvir = FWHM2Rc/G. Dashed line: best-fit linear relation. Dotted lines: rms dispersion of the residuals from the fitted linear relation (0.3 dex). Dot-dashed line: best-fit non linear relation. See Sect. 3 for details. Right panel: calibration of the “Spectroastrometric” virial product μspec = FWHM2rspec/G. Dashed line: best-fit linear relation. Dotted lines: rms dispersion of the residuals from the fitted relation (0.15 dex). See Sect. 5.1 for details.
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