Radial acceleration relation of galaxies with joint kinematic and weak-lensing data

Abstract

We combine kinematic and gravitational lensing data to construct the Radial Acceleration Relation (RAR) of galaxies over a large dynamic range. We improve on previous weak-lensing studies in two ways. First, we compute stellar masses using the same stellar population model as for the kinematic data. Second, we introduce a new method for converting excess surface density profiles to radial accelerations. This method is based on a new deprojection formula which is exact, computationally efficient, and gives smaller systematic uncertainties than previous methods. We find that the RAR inferred from weak-lensing data smoothly continues that inferred from kinematic data by about $2.5\mathrm{dex}$ in acceleration. Contrary to previous studies, we find that early- and late-type galaxies lie on the same joint RAR when a sufficiently strict isolation criterion is adopted and their stellar and gas masses are estimated consistently with the kinematic RAR.

41 pages, 16 figures, published version

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• Quasilocal Newtonian limit of general relativity and galactic dynamics
• Dynamical friction in the quasi-linear formulation of modified Newtonian dynamics (QuMOND)
• A new non-parametric method to infer galaxy cluster masses from weak lensing
• The radial acceleration relation at the EDGE of galaxy formation: testing its universality in low-mass dwarf galaxies
• Peculiar dark matter halos inferred from gravitational lensing as a manifestation of modified gravity
• Gas thermodynamics meets galaxy kinematics: Joint mass measurements for eROSITA galaxy clusters
• Measuring Mass of Gas in Central Galaxies using weak lensing and satellite kinematics in MOND
• A Relativistic Tensorial Model for Fractional Interaction between Dark Matter and Gravity
• The modified Newtonian dynamics with an extra anti-dissipation term can yield the MOND model