Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 389, Issue 2, Pages 701-705Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2008.13378.x
Keywords
gravitational lensing; galaxies : elliptical and lenticular, cD; galaxies : fundamental parameters; galaxies : kinematics and dynamics
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Bolton et al. have derived a mass-based fundamental plane using photometric and spectroscopic observations of 36 strong gravitational lenses. The lensing allows a direct determination of the mass-surface density and so avoids the usual dependence on mass-to-light ratio. We consider this same sample in the context of Modified Newtonian dynamics (MOND) and demonstrate that the observed mass-based fundamental plane coincides with the MOND fundamental plane determined previously for a set of polytropic spheres chosen to match the observed range of effective radii and velocity dispersions in elliptical galaxies. Moreover, the observed projected mass within one-half of an effective radius is consistent with the mass in visible stars plus a small additional component of 'phantom dark matter' resulting from the MOND contribution to photon deflection.
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