MIGHTEE-HI: The radial acceleration relation with resolved stellar mass measurements

Abstract

The radial acceleration relation (RAR) is a fundamental relation linking baryonic and dark matter in galaxies by relating the observed acceleration derived from dynamics to the one estimated from the baryonic mass. This relation exhibits small scatter, thus providing key constraints for models of galaxy formation and evolution -- allowing us to map the distribution of dark matter in galaxies -- as well as models of modified dynamics. However, it has only been extensively studied in the very local Universe with largely heterogeneous samples. We present a new measurement of the RAR, utilising a homogeneous sample of 19 HI-selected galaxies out to $z=0.08$. We introduce a novel approach of measuring resolved stellar masses using spectral energy distribution (SED) fitting across 10 photometric bands to determine the resolved mass-to-light ratio, which we show is essential for measuring the acceleration due to baryons in the low-acceleration regime. Our results reveal a tight RAR with a low-acceleration power-law slope of $\sim 0.5$, consistent with previous studies. Adopting a spatially varying mass-to-light ratio yields the tightest RAR with an intrinsic scatter of only $0.045\pm 0.022$ dex, highlighting the importance of resolved stellar mass measurements in accurately characterising the gravitational contribution of the baryons in low-mass, gas-rich galaxies. We also find the first tentative evidence for redshift evolution in the acceleration scale, but more data will be required to confirm this. Adopting a more general MOND interpolating function, we find that our results ameliorate the tension between previous RAR analyses, the Solar System quadrupole and wide-binary test.

Accepted for publication in MNRAS, 30 pages, 19 figures (+21 figures in the Appendix)

References in corpus (82)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• The Optical and Near-Infrared Properties of Galaxies: I. Luminosity and Stellar Mass Functions
• The Star Formation Efficiency in Nearby Galaxies: Measuring Where Gas Forms Stars Effectively
• Stellar mass-to-light ratios and the Tully-Fisher relation
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• The Hyper Suprime-Cam SSP Survey: Overview and Survey Design
• Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions
• UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
• Inferring the star-formation histories of massive quiescent galaxies with BAGPIPES: Evidence for multiple quenching mechanisms
• The Milky Way's bright satellites as an apparent failure of LCDM
• SPARC: Mass Models for 175 Disk Galaxies with Spitzer Photometry and Accurate Rotation Curves
• The Radial Acceleration Relation in Rotationally Supported Galaxies
• Second Data Release of the Hyper Suprime-Cam Subaru Strategic Program
• The Baryonic Tully-Fisher Relation of Gas Rich Galaxies as a Test of LCDM and MOND
• The Ursa Major Cluster of Galaxies. V ; HI Rotation Curve Shapes and the Tully-Fisher Relations
• xGASS: Total cold gas scaling relations and molecular-to-atomic gas ratios of galaxies in the local Universe
• One Law To Rule Them All: The Radial Acceleration Relation of Galaxies
• Third Data Release of the Hyper Suprime-Cam Subaru Strategic Program
• Galaxy Disks
• Reconstructing the stellar mass distributions of galaxies using S4G IRAC 3.6 and 4.5 micron images: II. The conversion from light to mass
• Molecular and atomic gas along and across the main sequence of star-forming galaxies
• The Mass Discrepancy-Acceleration Relation: Disk Mass and the Dark Matter Distribution
• The cold interstellar medium of galaxies in the Local Universe
• The baryonic Tully-Fisher relation for different velocity definitions and implications for galaxy angular momentum
• The DiskMass Survey. VII. The distribution of luminous and dark matter in spiral galaxies
• Can Feedback Solve the Too Big to Fail Problem?
• Fitting the radial acceleration relation to individual SPARC galaxies
• New Colour-Mass to Light Relations: the role of the Asymptotic Giant Branch phase and of interstellar dust
• A Critical Assessment of Stellar Mass Measurement Methods
• Weighing Galaxy Disks with the Baryonic Tully-Fisher Relation
• Volumetric star formation laws of disc galaxies
• Testing the Strong Equivalence Principle: Detection of the External Field Effect in Rotationally Supported Galaxies
• LITTLE THINGS in 3D: robust determination of the circular velocity of dwarf irregular galaxies
• The Mass-Discrepancy Acceleration Relation: a Natural Outcome of Galaxy Formation in Cold Dark Matter halos
• Tracing HI Beyond the Local Universe
• Robust HI kinematics of gas-rich ultra-diffuse galaxies: hints of a weak-feedback formation scenario
• The evolution of the Tully-Fisher relation between z~2.3 and z~0.9 with KMOS^3D
• The MOND limit from space-time scale invariance
• MIGHTEE-HI: The HI emission project of the MeerKAT MIGHTEE survey
• From light to baryonic mass: the effect of the stellar mass-to-light ratio on the Baryonic Tully-Fisher relation
• A statistical investigation of the mass discrepancy-acceleration relation
• The origin of the mass discrepancy-acceleration relation in $\Lambda$CDM
• The DiskMass Survey. II. Error Budget
• Λ CDM is Consistent with SPARC Radial Acceleration Relation
• The Balance of Dark and Luminous Mass in Rotating Galaxies
• The Star Forming Main Sequence of Dwarf Low Surface Brightness Galaxies
• Calibration of the Mid-Infrared Tully-Fisher Relation
• fgivenx: A Python package for functional posterior plotting
• The Weak Lensing Radial Acceleration Relation: Constraining Modified Gravity and Cold Dark Matter theories with KiDS-1000
• The Radial Acceleration Relation in CLASH Galaxy Clusters
• The baryonic specific angular momentum of disc galaxies
• Stellar Populations and the Star Formation Histories of LSB Galaxies: III. Stellar Population Models
• Stellar population synthesis models between 2.5 and 5 μm based on the empirical IRTF stellar library
• Strong constraints on the gravitational law from $Gaia$ DR3 wide binaries
• Testing the Strong Equivalence Principle. II. Relating the External Field Effect in Galaxy Rotation Curves to the Large-Scale Structure of the Universe
• The impact of gas disc flaring on rotation curve decomposition and revisiting baryonic and dark-matter relations for nearby galaxies
• The KMOS Redshift One Spectroscopic Survey (KROSS): The Tully-Fisher Relation at z ~ 1
• MIGHTEE-HI: The baryonic Tully-Fisher relation over the last billion years
• Being WISE I: Validating Stellar Population Models and M/L ratios at 3.4 and 4.6 microns
• NIHAO XVIII: Origin of the MOND phenomenology of galactic rotation curves in a LCDM universe
• A new astrophysical solution to the Too Big To Fail problem - Insights from the MoRIA simulations
• The Radial Acceleration Relation in Disk Galaxies in the MassiveBlack-II Simulation
• The radial acceleration relation in galaxy clusters
• The radial acceleration relation in a $\Lambda$CDM universe
• Probing the radial acceleration relation and the strong equivalence principle with the Coma cluster ultra-diffuse galaxies
• Radial acceleration relation of galaxies with joint kinematic and weak-lensing data
• On the tension between the Radial Acceleration Relation and Solar System quadrupole in modified gravity MOND
• On the functional form of the radial acceleration relation
• On the radial acceleration relation of $\Lambda$CDM satellite galaxies
• MIGHTEE-HI: deep spectral line observations of the COSMOS field
• The Redshift-Dependence of Radial Acceleration: Modified Gravity versus Particle Dark Matter
• CO Tully-Fisher Relation of Star-forming Galaxies at z=0.05-0.3
• On the fundamentality of the radial acceleration relation for late-type galaxy dynamics
• The underlying radial acceleration relation
• BUDHIES V: The baryonic Tully-Fisher relation at z=0.2 based on direct HI detections
• A Distinct Radial Acceleration Relation across Brightest Cluster Galaxies and Galaxy Clusters
• Photometric vs dynamical stellar masses and their impact on scaling relations in nearby disc galaxies
• Testing Modified Gravity Theories with Numerical Solutions of the External Field Effect in Rotationally Supported Galaxies
• A Short History of the Missing Mass and Dark Energy Paradigms

Cited by in corpus (7)

• The radial acceleration relation at the EDGE of galaxy formation: testing its universality in low-mass dwarf galaxies
• MUSE-DARK III: The evolution of the radial acceleration relation at intermediate redshifts
• A 15 Mpc rotating galaxy filament at redshift z = 0.032
• Renzo's rule revisited: A statistical study of galaxies' baryon - dark matter coupling
• Testing subhalo abundance matching with galaxy kinematics
• Is the acceleration scale of the radial acceleration relation tracking the cosmic expansion rate?
• Improved constraints on modified Newtonian gravity from Cassini radio tracking data