Author ORCID Identifier
Document Type
Article
Publication Date
4-19-2024
Abstract
Recent studies reveal a radial acceleration relation (RAR) in galaxies, which illustrates a tight empirical correlation connecting the observational acceleration and the baryonic acceleration with a characteristic acceleration scale. However, a distinct RAR has been revealed on brightest cluster galaxy (BCG) cluster scales with a seventeen-times-larger acceleration scale due to the gravitational lensing effect. In this work, we systematically explore the acceleration and mass correlations between dynamical and baryonic components in 50 BCGs. To investigate the dynamical RAR in BCGs, we derived their dynamical accelerations from the stellar kinematics using the Jeans equation through Abel inversion and adopted the baryonic mass from Sloan Digital Sky Survey photometry. We explored the spatially resolved kinematic profiles with the largest integral field spectroscopy (IFS) data collected by the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey. Our results demonstrate that the dynamical RAR in BCGs is consistent with the lensing RAR on BCG-cluster scales as well as a larger acceleration scale. This finding may imply that BCGs and galaxy clusters have fundamental differences from field galaxies. We also find a mass correlation, but it is less tight than the acceleration correlation.
Keywords
CD, dark matter, galaxies: clusters: general, galaxies: elliptical and lenticular, galaxies: kinematics and dynamics
Publication Title
Astronomy and Astrophysics
Grant
PHY-1911909
Rights
© The Authors 2024. 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
A distinct radial acceleration relation across the brightest cluster galaxies and galaxy clusters Yong Tian, Chung-Ming Ko, Pengfei Li, Stacy McGaugh and Shemile L. Poblete A&A, 684 (2024) A180 DOI: https://doi.org/10.1051/0004-6361/202347868
Manuscript Version
Final Publisher Version