A Distinct Radial Acceleration Relation across Brightest Cluster Galaxies and Galaxy Clusters

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 BCG-cluster scales with a seventeen times larger acceleration scale by the gravitational lensing effect. In this work, we systematically explored the acceleration and mass correlations between dynamical and baryonic components in 50 Brightest Cluster Galaxies (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 the SDSS photometry. We explored the spatially resolved kinematic profiles with the largest integral field spectroscopy (IFS) data mounted 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.

10 pages, 6 figures

References in corpus (25)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations
• Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
• The Radial Acceleration Relation in Rotationally Supported Galaxies
• One Law To Rule Them All: The Radial Acceleration Relation of Galaxies
• emcee v3: A Python ensemble sampling toolkit for affine-invariant MCMC
• A new relativistic theory for Modified Newtonian Dynamics
• A Novel Test of the Modified Newtonian Dynamics with Gas Rich Galaxies
• From galactic bars to the Hubble tension: weighing up the astrophysical evidence for Milgromian gravity
• Cluster-galaxy weak lensing
• X-ray Group and cluster mass profiles in MOND: Unexplained mass on the group scale
• SDSS-IV MaNGA: Modeling the Spectral Line Spread Function to Sub-Percent Accuracy
• The Weak Lensing Radial Acceleration Relation: Constraining Modified Gravity and Cold Dark Matter theories with KiDS-1000
• The gravitational field of X-COP galaxy clusters
• Generalizing MOND to explain the missing mass in galaxy clusters
• The radial acceleration relation in galaxy clusters
• Yet another test of Radial Acceleration Relation for galaxy clusters
• X-ray analysis of JWST's first galaxy cluster lens SMACS J0723.3-7327
• On the Presence of a Universal Acceleration Scale in Elliptical Galaxies
• Measuring galaxy cluster mass profiles into the low acceleration regime with galaxy kinematics
• Halo Acceleration Relation
• Mass-Velocity Dispersion Relation in HIFLUGCS Galaxy Clusters
• Mass-Velocity Dispersion Relation in MaNGA Brightest Cluster Galaxies
• Testing the Collisionless Nature of Dark Matter with the Radial Acceleration Relation in Galaxy Clusters

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• The radial acceleration relation at the EDGE of galaxy formation: testing its universality in low-mass dwarf galaxies
• Gas thermodynamics meets galaxy kinematics: Joint mass measurements for eROSITA galaxy clusters
• Distinct radial acceleration relations of galaxies and galaxy clusters supports hyperconical modified gravity