Document Type
Article
Publication Date
4-4-2024
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 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.
Keywords
galaxy dynamics, modified gravity, rotation curves of galaxies, weak gravitational lensing
Publication Title
Journal of Cosmology and Astroparticle Physics
Rights
© 2024 The Author(s). Published by IOP Publishing Ltd on behalf of Sissa Medialab. This is an Open Access work distributed under the terms of the Creative Commons Attribution Licence (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
T. Mistele et al. Radial Acceleration Relation of Galaxies with Joint Kinematic and Weak-Lensing Data. JCAP04(2024)020
Manuscript Version
Final Publisher Version